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AP Calculus AB Free Response Questions

The best way to get better at FRQs is practice. Browse through dozens of practice AP Calculus AB FRQs to get ready for the big day.

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  • Unit 1: Limits and Continuity (31)
  • Unit 2: Differentiation: Definition and Fundamental Properties (27)
  • Unit 3: Differentiation: Composite, Implicit, and Inverse Functions (33)
  • Unit 4: Contextual Applications of Differentiation (32)
  • Unit 5: Analytical Applications of Differentiation (33)
  • Unit 6: Integration and Accumulation of Change (26)
  • Unit 7: Differential Equations (35)
  • Unit 8: Applications of Integration (33)
Unit 1: Limits and Continuity

Absolute Value Function and Discontinuity

Consider the function $$f(x)=\begin{cases} \frac{|x-5|}{x-5} & x\neq5 \\ 0 & x=5 \end{cases}$$. Answ

Easy

Algebraic Simplification and Limit Evaluation of a Log-Exponential Function

Consider the function $$z(x)=\ln\left(\frac{e^{3*x}+e^{2*x}}{e^{3*x}-e^{2*x}}\right)$$ for $$x \neq

Hard

Analyzing a Piecewise Function’s Limits and Continuity

Consider the function $$f(x)= \begin{cases} \frac{x^2-9}{x-3} & \text{if } x \neq 3, \\ k & \text{if

Easy

Analyzing a Velocity Function with Nested Discontinuities

A particle’s velocity along a line is given by $$v(t)= \frac{(t-1)(t+3)}{(t-1)*\ln(t+2)}$$ for $$t>0

Hard

Analyzing End Behavior and Asymptotes

Consider the function $$f(x)= \frac{5x - 7}{\sqrt{x^2 + 1}}$$. Answer the following:

Hard

Analyzing Limit of an Oscillatory Velocity Function

A particle moves along a line with velocity given by $$v(t)= t*\cos\left(\frac{\pi}{t}\right)$$ for

Hard

Analyzing Process Data for Continuity

A manufacturing process produces items whose lengths (in mm) are recorded as a function f(x) of time

Medium

Application of the Intermediate Value Theorem in a Logistic Model

Let $$ f(x)=\frac{1}{1+e^{-x}} $$, a logistic function that is continuous for all x. Analyze its beh

Medium

Asymptotic Analysis of a Rational Function

Consider the function $$f(x)= \frac{4*x^2 - 1}{2*x^2+3*x}$$.

Medium

Asymptotic Behavior of a Logarithmic Function

Consider the function $$w(x)=\frac{\ln(x+e)}{x}$$ for $$x>0$$. Analyze its behavior as $$x \to \inft

Medium

Capstone Problem: Continuity and Discontinuity in a Compound Piecewise Function

Consider the function $$f(x)=\begin{cases} \frac{x^2-1}{x-1} & x<2 \\ \frac{x^2-4}{x-2} & x\ge2 \end

Extreme

Composite Function and Continuity Analysis

Define \(f(x)=\sqrt{1-\ln(x)}\) for \(x>0\) and consider the composite function \(g(x)=f(e^x)\). Ans

Hard

Continuity Analysis of a Piecewise Function

Consider the function defined by $$ f(x)=\begin{cases}2x+1, & x<1,\\ x^2, & 1\le x\le 3,\\ 7-x, & x

Medium

Continuity in a Piecewise Function with Square Root and Rational Expression

Consider the function $$f(x)=\begin{cases} \sqrt{x+6}-2 & x<-2 \\ \frac{(x+2)^2}{x+2} & x>-2 \\ 0 &

Hard

Continuity of Composite Functions

Let $$f(x)=x+2$$ for all x, and let $$g(x)=\begin{cases} \sqrt{x}, & x \geq 0 \\ \text{undefined},

Easy

Evaluating Trigonometric Limits Without a Calculator

Consider the function $$f(x)= \frac{\sin(3*x)}{x}$$. Answer the following:

Easy

Factoring a Cubic Expression for Limit Evaluation

Consider the function $$f(x)= \frac{x^3 - 8}{x - 2}$$ for x \(\neq\) 2. Answer the following parts.

Hard

Intermediate Value Theorem in Temperature Modeling

A continuous function $$ f(x) $$ describes the temperature (in °C) throughout a day, with $$f(0)=15$

Easy

Limit Evaluation in a Parametric Particle Motion Context

A particle’s position in the plane is given by the parametric equations $$x(t)= \frac{t^2-4}{t-2}, \

Extreme

Limit Evaluation with a Parameter in a Log-Exponential Function

Consider the function $$r(x)=\frac{e^{a*x} - e^{b*x}}{\ln(1+x)}$$ defined for $$x \neq 0$$, where $$

Hard

Limit Involving a Square Root and Removable Discontinuity

Consider the function $$h(x)=\frac{\sqrt{x+4}-2}{x}$$ for $$x\neq0$$ and $$h(0)=1$$. Answer the foll

Easy

Limits of a Composite Particle Motion Function

A particle moves along a line with velocity function $$v(t)= \frac{\sqrt{t+5}-\sqrt{5}}{t}$$ for $$t

Extreme

Modeling Temperature Change: A Real-World Limit Problem

A scientist records the temperature (in °C) of a chemical reaction during a 24-hour period using the

Medium

Oscillatory Behavior and Discontinuity

Consider the function $$f(x)=\begin{cases} x\cos(\frac{1}{x}) & x\neq0 \\ 2 & x=0 \end{cases}$$. Ans

Medium

Piecewise Function Continuity Analysis

The function f is defined by $$ f(x) = \begin{cases} \frac{x^2 - 1}{x - 1}, & x \neq 1 \\ k, & x

Easy

Squeeze Theorem Application

Let $$f(x)=x^2\sin(1/x)$$ for \(x\neq 0\) and define \(f(0)=0\). Use the Squeeze Theorem to complete

Medium

Squeeze Theorem Application

Consider the function $$f(x)=x^2\sin(\frac{1}{x})$$ for $$x\neq0$$ and $$f(0)=0$$. Answer the follow

Easy

Squeeze Theorem Application with Trigonometric Functions

Let $$f(x)= x^2 \sin(1/x)$$ for $$x\neq0$$, and define $$f(0)=0$$.

Medium

Squeeze Theorem with Trigonometric Function

Consider the function \(h(x)=x^2\cos(1/x)\) for \(x\neq0\) with \(h(0)=0\). Answer the following:

Medium

Table Analysis for Estimating a Limit

The table below shows values of the function $$g(x)$$ for x near 4. Use this data to answer the foll

Easy

Vertical Asymptotes and Horizontal Limits

Consider the function $$f(x)=\frac{3*x}{x-2}$$.

Medium
Unit 2: Differentiation: Definition and Fundamental Properties

Acceleration Through Successive Differentiation

A particle’s position is given by $$s(t)=t^3-6*t^2+9*t+4$$ (with s in meters and t in seconds). Answ

Easy

Analyzing Rate of Change in Economics

The cost function for producing $$x$$ units of product (in dollars) is given by $$C(x)= 0.5*x^2 - 8*

Medium

Approximating Small Changes with Differentials

Let $$f(x)= x^3 - 5*x + 2$$. Use differentials to approximate small changes in the value of $$f(x)$$

Medium

Behavior of the Derivative Near a Vertical Asymptote

Consider the function \(f(x)=\frac{1}{x+2}\) defined for \(x \neq -2\). Answer the following parts.

Extreme

Car Fuel Consumption vs. Refuel

A car is being refueled at a constant rate of $$4$$ liters/min while it is being driven. Simultaneou

Medium

Car's Position and Velocity

A car’s position is modeled by \(s(t)=t^3 - 6*t^2 + 9*t\), where \(s\) is in meters and \(t\) is in

Medium

Derivative Applications in Motion Along a Curve

A particle moves such that its horizontal position is given by $$x(t)= t^2 + 2*t$$ and its vertical

Medium

Exponential Growth Rate

Consider the function $$f(x)= 3*e^{2*x}$$ which models a quantity growing exponentially over time.

Medium

Exponential Rate of Change

A population growth model is given by $$P(t)=e^{2*t}$$, where $$t$$ is in years.

Easy

Finding Derivatives of Composite Functions

Let $$f(x)= (3*x+1)^4$$.

Medium

Graphical Estimation of a Derivative

Consider the graph provided which plots the position $$s(t)$$ (in meters) of an object versus time $

Medium

Higher Order Derivatives and Concavity

Let \(f(x)=x^3 - 3*x^2 + 5*x - 2\). Answer the following parts.

Medium

Instantaneous Acceleration from a Velocity Function

An object's velocity is given by $$v(t)=3*t^2 - 12*t + 9$$, where $$t$$ is in seconds. Answer the fo

Hard

Instantaneous Rate and Maximum Acceleration

An object’s position is given by $$s(t)=t^4-4t^3+2t^2$$ (in meters), where t is in seconds. Answer t

Hard

Interpreting Derivative Graphs and Tangent Lines

A graph of the function $$f(x)=x^2 - 2*x + 1$$ along with its tangent line at $$x=2$$ is provided. A

Medium

Inverse Function Analysis: Quadratic Transformation

Consider the function $$f(x)=x^2+2*x+2$$ with the domain restricted to $$x\geq -1$$ so that f is one

Easy

Inverse Function Analysis: Rational Function

Consider the function $$f(x)=\frac{2*x+1}{x+3}$$ defined for all x except $$x=-3$$.

Hard

Motion Analysis with Acceleration and Direction Change

A particle moves along a straight line with acceleration given by $$a(t)=12-4*t$$, where $$t$$ is in

Hard

Optimization of Production Cost

A manufacturer’s cost function is given by $$C(x)=x^3-15x^2+60x+200$$, where x represents the produc

Hard

Product Rule Application

Consider the function $$f(x)= (2*x + 3) * (x^2 - x + 4)$$.

Medium

Real World Application: Rate of Change in River Depth

The depth of a river (in meters) across its width (in kilometers) is given by $$d(x)= 10 - 0.5*x^2$$

Medium

Related Rates: Conical Tank Draining

A conical water tank drains so that its volume is given by $$V=\frac{1}{3}\pi r^2h$$. The radius r o

Hard

Secant and Tangent Lines

Consider the function $$f(x)= x^2$$. Use graphical and algebraic methods to examine the behavior of

Easy

Secant and Tangent Lines for a Trigonometric Function

Let $$f(x)=\sin(x)+x^2$$. Use the definition of the derivative to find $$f'(x)$$ and evaluate it at

Extreme

Social Media Followers Dynamics

A social media account gains followers at a rate $$f(t)=150-10*t$$ (followers/hour) and loses follow

Easy

Tangent Lines and Local Linearization

Consider the function $$f(x)=\sqrt{x}$$.

Medium

Water Tank Inflow-Outflow Analysis

A water tank receives water at a rate given by $$f(t)=3*t+2$$ (liters/min) and loses water at a rate

Medium
Unit 3: Differentiation: Composite, Implicit, and Inverse Functions

Chain and Product Rules in a Rate of Reaction Process

In a chemical reaction, the rate is modeled by the function $$R(t)= \sqrt{t+3}*\cos(2*t)$$, where $$

Medium

Chain Rule Basics

Consider the function $$f(x) = \sqrt{3*x^2 + 2}$$. Answer the following:

Easy

Chain Rule in an Implicitly Defined Function

Consider the equation $$\tan(x+y)=x^2-y^2$$. Answer the following:

Extreme

Composite Function and Multiple Rates

An object's distance is modeled by the function $$s(t)= \sqrt{1+ [h(t)]^2}$$, where $$h(t)= \ln(5*t+

Medium

Composite Function and Tangent Line

Consider the function $$f(x)=\sqrt{3*x^2+2*x+1}$$. (Note: All derivatives are to be computed without

Easy

Composite Function Modeling in Finance

A bank models the growth of a savings account by the function $$B(t)= f(g(t))$$, where $$g(t)= \ln(t

Hard

Composite Function via Chain Rule in a Financial Context

A company’s profit (in dollars) based on production level (in thousands of units) is modeled by the

Medium

Composite Function with Nested Chain Rule

Let $$h(x)=\sqrt{\ln(4*x^2+1)}$$. Answer the following:

Medium

Composite Functions with Multiple Layers

Let $$f(x)=\sqrt{\ln(5*x^2+1)}$$. Answer the following:

Extreme

Composite Inverse Trigonometric Function Evaluation

Let $$f(x)= \tan(2*x)$$, defined on a restricted domain where it is invertible. Analyze this functio

Hard

Composite Log-Exponential Function Analysis

A function is defined by $$f(x)=\ln\left(e^(2*x^2) + 5\right)$$. This function is composed of an exp

Medium

Composite Temperature Model

Consider a temperature function given by $$T(t) = \sin(t^3 - 2*t)$$, where t is measured in seconds.

Medium

Concavity Analysis of an Implicit Curve

Consider the relation $$x^2+xy+y^2=7$$.

Hard

Derivative of an Inverse Function

Let $$f$$ be a differentiable function with an inverse function $$g$$ such that $$f(2)=5$$ and $$f'(

Easy

Differentiation of a Complex Implicit Equation

Consider the equation $$\sin(xy) + \ln(x+y) = x^2y$$.

Extreme

Differentiation of Inverse Function with Polynomial Functions

Let \(f(x)= x^3+2*x+1\) be a one-to-one function. Its inverse is denoted by \(f^{-1}\).

Medium

Differentiation of Nested Composite Logarithmic-Trigonometric Function

Consider the function $$f(x)=\ln(\sin(3x^2+2))$$.

Hard

Differentiation Under Implicit Constraints in Physics

A particle moves along a path defined by the equation $$\sin(x*y)=x-y$$. This equation implicitly de

Extreme

Implicit Differentiation in an Economic Demand-Supply Model

In an economic model, the relationship between supply (\(S\)) and demand (\(D\)) is given by the equ

Hard

Implicit Differentiation Involving a Logarithm

Consider the equation $$x*\ln(y) + y^2 = x^2$$. Answer the following parts.

Extreme

Implicit Differentiation on a Circle

Consider the circle defined by $$x^2+y^2=25$$.

Easy

Implicit Differentiation with Logarithmic and Radical Components

Consider the equation $$\ln(x+y)=\sqrt{x*y}$$.

Hard

Implicit Trigonometric Equation Analysis

Consider the equation $$x \sin(y) + \cos(y) = x$$. Answer the following parts.

Hard

Inverse Function Derivative in Thermodynamics

A thermodynamic process is modeled by the function $$P(V)= 3*V^2 + 2*V + 5$$, where $$V$$ is the vol

Medium

Inverse Function Differentiation

Let $$f(x)=x^3+x$$ which is one-to-one on its domain. Its inverse function is denoted by $$g(x)$$.

Easy

Inverse Function Differentiation

Let $$f(x)=x^3+x$$ and assume it is invertible. Answer the following:

Medium

Inverse Function Differentiation in a Biological Growth Curve

A biological measurement is modeled by the function $$f(t)= \frac{4*t}{t+2}$$, which is one-to-one o

Medium

Inverse Function Differentiation in a Piecewise Scenario

Consider the piecewise function $$f(x)=\begin{cases} x^2+1, & x \geq 0 \\ -x+1, & x<0 \end{cases}$$

Extreme

Inverse Function Differentiation in Logarithmic Functions

Let $$f(x)=\ln(x+2)$$, which is one-to-one and has an inverse function $$g(y)$$. Answer the followin

Medium

Inverse Function in Currency Conversion

A function converting dollars to euros is given by $$f(d) = 0.9*d + 10\ln(d+1)$$ for $$d > 0$$. Let

Medium

Inverse Trigonometric Differentiation

Let $$y = \arcsin\left(\frac{2*x}{1+ x^2}\right)$$. Answer the following parts.

Hard

Inverse Trigonometric Function Differentiation

Consider the function $$y=\arctan(2*x)$$. Answer the following:

Medium

Optimization in a Container Design Problem

A manufacturer is designing a closed cylindrical container with a fixed volume of $$1000\,cm^3$$. Th

Hard
Unit 4: Contextual Applications of Differentiation

Accelerating Car Motion Analysis

A car's velocity is modeled by $$v(t)=4t^2-16t+12$$ in m/s for $$t\ge0$$. Analyze the car's motion.

Medium

Analyzing a Nonlinear Rate of Revenue Change

A company's revenue in thousands of dollars is modeled by the function $$R(x)=100\ln(x+1) + 0.5x$$,

Hard

Analyzing Rate of Change in a Compound Interest Model

The amount in a bank account is modeled by $$A(t)= P e^{rt}$$, where $$P = 1000$$, r = 0.05 (per yea

Easy

Cooling Coffee: Temperature Rate of Change

The temperature (in °F) of a cup of coffee is modeled by $$T(t)=70+50e^{-0.1t}$$, where $$t$$ is mea

Easy

Economic Cost Analysis Using Derivatives

A company’s cost function for producing $$x$$ units is given by $$C(x)=0.05*x^3 - 2*x^2 + 40*x + 100

Medium

Estimating Small Changes using Differentials

In an electrical circuit, the resistance is given by $$R(x) = \frac{1}{1+x^2}$$, where x is a parame

Easy

Expanding Circular Ripple in a Pond

A circular ripple in a pond has its area increasing at a constant rate of 10 square meters per secon

Easy

Falling Object Analysis

An object is dropped from a height and its position is modeled by $$s(t)=100-4.9t^2$$ (in meters), w

Medium

Falling Object's Velocity Analysis

A rock is thrown upward from the top of a building with a velocity function $$v(t)= 20 - 9.8*t$$ (in

Easy

Free Fall Motion Analysis

An object in free fall near Earth's surface has its position modeled by $$s(t)=-4.9t^2+20t+1$$ (in m

Easy

FRQ 17: Water Heater Temperature Change

The temperature of water in a heater is modeled by $$T(t) = 20 + 80e^{-0.05*t}$$, where t is in minu

Easy

Graphing a Function via its Derivative

Consider the function $$f(x) = x^{1/3}$$ defined for all real numbers.

Medium

Hybrid Exponential-Logarithmic Convergence

Consider the function $$f(x)=e^{-x}\ln(1+2x)$$, which combines exponential decay with logarithmic gr

Extreme

Inflating Balloon

A spherical balloon is being inflated. Its volume increases at a constant rate of 12 in³/sec. The vo

Medium

Inflection Points and Concavity in Business Forecasting

A company's profit is modeled by $$P(x)= 0.5*x^3 - 6*x^2 + 15*x - 10$$, where $$x$$ represents a pro

Medium

Inverse Function Analysis in a Real-World Model

Consider the function $$f(x)=x^3+1$$ which models a certain transformation of measurable quantities.

Medium

Inverse Trigonometric Analysis for Navigation

A navigation system relates the angle of elevation $$\theta$$ to a mountain with the horizontal dist

Hard

Limit Evaluation Using L'Hôpital's Rule

Evaluate the limit $$\lim_{x \to \infty} \frac{5x^3 - 4x^2 + 1}{7x^3 + 2x - 6}$$.

Medium

Linearization of a Machine Component's Length

A machine component's length is modeled by $$L(x)=x^4$$, where x is a machine setting in inches. Use

Medium

Linearization of a Nonlinear Function

Suppose $$f(x)=\ln(x)$$. Use linearization about $$x=4$$ to approximate $$\ln(4.1)$$. Answer the fol

Easy

Motion Along a Curved Path

An object moves along the curve given by $$y=\ln(x)$$ for $$x\geq 1$$. Suppose the x-component of th

Medium

Motion Analysis of a Particle on a Line

A particle’s position is modeled by $$s(t)=3t^3-6t^2+2t+1$$, where s is in meters and t in seconds.

Medium

Optimization in Packaging

An open-top box with a square base is to be constructed so that its volume is fixed at $$1000\;cm^3$

Hard

Particle Acceleration and Direction of Motion

A particle moves along a straight line with a velocity function given by $$v(t)=3*t^2-12*t+9$$, wher

Medium

Population Growth with Changing Rates

A population is modeled by the piecewise function $$P(t)=\begin{cases}50e^{0.1t}&t<10\\500e^{0.05t}&

Hard

Profit Optimization Analysis

The profit function for a company is given by $$P(x)=-2x^3+15x^2-40x+25$$, where x (in thousands) re

Hard

Related Rates in Shadows: A Lamp and a Tree

A lamp post 5 m tall casts a shadow of a tree. At a certain moment, the tree is 3 m from the lamp an

Hard

Related Rates: Expanding Oil Spill

An oil spill on calm water forms a perfect circle. The area of the spill is increasing at a constant

Medium

Related Rates: Shadow Length

A 1.8-meter tall person is walking away from a 4.5-meter tall streetlight at a constant speed of 1.2

Easy

Shadow Length Problem

A person 1.80 m tall walks away from a 3.0 m tall lamppost at a rate of 1.2 m/s. Let $$x$$ be the di

Medium

Shadow Length: Related Rates

A 15-foot tall lamp post casts light on a 6-foot tall man walking away from the lamp at 4 ft/sec. Le

Medium

Transformation of Logarithmic Functions

Consider the function $$f(x)=\ln(3x-2)$$. Analyze the function and its transformation:

Medium
Unit 5: Analytical Applications of Differentiation

Airport Runway Deicing Fluid Analysis

An airport runway is being de-iced. The fluid is applied at a rate $$F(t)=12*\sin(\frac{\pi*t}{4})+1

Medium

Application of Rolle's Theorem to a Trigonometric Function

Consider the function $$f(x) = \sin(x)$$ defined on the interval $$[0, \pi]$$. Answer the following:

Easy

Average Value of a Function and Mean Value Theorem for Integrals

Consider the function $$f(x)= e^{-x}$$ on the interval $$[0, 2]$$. Answer the following:

Hard

Chemical Mixing in a Tank

A 200-liter tank initially contains pure water. A salt solution with a concentration of 0.5 kg/L flo

Medium

Continuous Compound Interest

An investment account is governed by the formula $$A(t)= A_0 * e^{r*t}$$, where $$r$$ is the continu

Medium

Cost Function and the Mean Value Theorem in Economics

An economic model gives the cost function as $$C(x)= 100 + 20*x - 0.5*x^2$$, where x represents the

Medium

Derivative and Concavity of f(x)= e^(x) - ln(x)

Consider the function $$f(x)= e^{x}-\ln(x)$$ for $$x>0$$. Answer the following:

Hard

Determining Absolute and Relative Extrema

Analyze the function $$f(x)= \frac{x}{1+x^2}$$ on the interval $$[-2,2]$$.

Medium

Determining Intervals of Increase and Decrease with a Rational Function

Consider the function $$f(x) = \frac{x^2}{x+2}$$ defined on the interval $$[0, 4]$$. Answer the foll

Hard

Discontinuity in a Rational Function Involving Square Roots

Consider the function $$ f(x) = \begin{cases} \frac{\sqrt{x+3} - 2}{x - 1}, & x \neq 1, \\ -1, & x

Medium

FRQ 3: Relative Extrema for a Cubic Function

Consider the function $$f(x) = x^3 - 6*x^2 + 9*x + 2$$.

Medium

FRQ 5: Concavity and Points of Inflection for a Cubic Function

For the function $$f(x) = x^3 - 6*x^2 + 9*x + 2$$, analyze its concavity.

Medium

FRQ 8: Mean Value Theorem and Non-Differentiability

Examine the function $$f(x)=|x|$$ on the interval [ -1, 1 ].

Easy

FRQ 9: Extreme Value Analysis for a Rational Function

Consider the function $$f(x) = \frac{x}{1+x^2}$$ defined on the interval [ -2, 2 ].

Medium

Inverse Analysis of a Cooling Temperature Function

A cooling process is described by the function $$f(t)=20+80*e^{-0.05*t}$$, where t is the time in mi

Hard

Inverse Analysis of a Function with Square Root and Linear Term

Consider the function $$f(x)=\sqrt{3*x+1}+x$$. Answer the following questions regarding its inverse.

Hard

Inverse Analysis of a Linear Function

Consider the function $$f(x)=3*x+2$$. Analyze its inverse function by answering all parts below.

Easy

Inverse Analysis of a Logarithm-Exponential Hybrid Function

Consider the function $$f(x)=\ln(x+2)+e^(x)$$ defined for $$x>-2$$. Address the following regarding

Hard

Inverse Analysis of a Quadratic Function (Restricted Domain)

Consider the function $$f(x)=x^2-4*x+7$$ defined on the restricted domain $$[2, \infty)$$. Analyze t

Medium

Inverse Analysis: Transformation Geometry of a Parabolic Function

Consider the function $$f(x)=4-(x-3)^2$$ with the domain $$x\le 3$$. Analyze its inverse function as

Medium

Investigating a Piecewise Function with a Vertical Asymptote

Consider the function $$ f(x) = \begin{cases} \frac{x^2-1}{x-1}, & x < 1, \\ 3, & x = 1, \\ 2x+1, &

Hard

Mean Value Theorem for a Piecewise Function

Consider the function defined by $$ f(x)= \begin{cases} x^2, & x \le 2, \\ 4x - 4, & x > 2, \end

Hard

Newton's Law of Cooling

An object cooling in a room follows Newton's Law of Cooling: $$T(t)= T_{room} + (T_{initial}-T_{room

Medium

Optimization of a Rectangular Enclosure

A rectangular pen is to be constructed along the side of a barn so that only three sides require fen

Medium

Pharmaceutical Drug Delivery

A drug is administered intravenously using an infusion device. The drug infusion rate is given by $$

Medium

Population Growth Analysis via the Mean Value Theorem

A country's population data over a period of years is given in the table below. Use the data to anal

Medium

Profit Analysis and Inflection Points

A company's profit is modeled by $$P(x)= -x^3 + 9*x^2 - 24*x + 10$$, where $$x$$ represents thousand

Hard

Relationship Between Integration and Differentiation

Let $$F(x)= \int_{0}^{x} (t^2 - t + 1)\,dt$$. Explore the relationship between the integral and its

Easy

Reservoir Evaporation and Rainfall

A reservoir gains water through rainfall and loses water by evaporation. Rainfall occurs at a rate g

Hard

Slope Analysis for Parametric Equations

A curve is defined parametrically by $$x(t)= t^2$$ and $$y(t)= t^3 - 3*t$$ for $$t$$ in the interval

Extreme

Solving a Log-Exponential Equation

Solve the equation $$\ln(x)+x=0$$ for $$x>0$$. Answer the following:

Extreme

Solving an Exponential Equation

Solve for $$x$$ in the equation $$e^{2x}= 5*e^{x}$$. Answer the following:

Easy

Urban Water Supply Management

An urban water supply system receives water from two sources. The inflow rates are $$R_1(t)=15+2*t$$

Medium
Unit 6: Integration and Accumulation of Change

Accumulated Altitude Change: Hiking Profile

During a hike, a climber's rate of change of altitude (in m/hr) is recorded as shown in the table be

Easy

Accumulated Change Function Evaluation

Let $$F(x)=\int_{1}^{x} (2*t+3)\,dt$$ for $$x \ge 1$$. This function represents the accumulated chan

Easy

Accumulation and Total Change in a Population Model

A population grows at a rate given by $$r(t)=0.2*t^2 - t + 5$$ (in thousands per year), where t is i

Medium

Approximating Area Under a Curve with Riemann Sums

Consider a function $$f(x)$$ whose values are tabulated below for different values of $$x$$. Use the

Easy

Area Between Curves: $$y=x^2$$ and $$y=4*x$$

Consider the curves defined by $$f(x)= x^2$$ and $$g(x)= 4*x$$. Answer the following questions to de

Medium

Area Under a Parabola

Consider the quadratic function $$f(x)=x^2 - 4*x + 3$$. Analyze the function on the interval $$[1,4]

Easy

Average Temperature Calculation over 12 Hours

In a city, the temperature over a 12-hour period is modeled by $$T(t) = -2*t + 20$$ (in $$^\circ C$$

Medium

Chemical Accumulation in a Reactor

A chemical reactor has a net accumulation rate given by $$R(t)=5*\cos(t) + 2$$ (in kg/hour), where $

Hard

Coffee Brewing Dynamics

An advanced coffee machine drips water into the brewing chamber at a rate of $$W(t)=10+t$$ mL/s, whi

Easy

Evaluating a Definite Integral Using U-Substitution

Compute the integral $$\int_{0}^{3} (2*t+1)^5\,dt$$ using u-substitution.

Medium

Evaluating an Integral with U-substitution

Evaluate the integral $$\int_{1}^{3} 2*(x-1)^5\,dx$$ using u-substitution. Answer the following ques

Easy

Exploring the Fundamental Theorem of Calculus

Let the function $$F(x) = \int_{1}^{x} \frac{1}{t^2+1}\,dt$$ represent an accumulation function. Ans

Medium

FRQ6: Inverse Analysis of a Displacement Function

Let $$ S(t)=\int_{0}^{t} (6-2*u)\,du $$ for t in [0, 3], representing displacement in meters. Answer

Easy

FRQ8: Inverse Analysis of a Piecewise-Defined Accumulation Function

Let $$ R(x)=\begin{cases} \int_{1}^{x} t\,dt, & 1 \le x \le 3 \\ \int_{1}^{x} (2*t-1)\,dt, & x > 3 \

Hard

FRQ11: Inverse Analysis of a Parameterized Function

For a positive constant a, consider the function $$ F(x)=\int_{a}^{x} \frac{1}{t+a}\,dt $$ for x > a

Medium

FRQ20: Inverse Analysis of a Function with a Piecewise Continuous Integrand

Consider the function $$ I(x)= \begin{cases} \int_{0}^{x}\cos(t)\,dt, & 0 \le x \le \pi/2 \\ \int_{0

Hard

Graphical Analysis of an Accumulation Function

Let $$f(t)$$ represent the rate of water flow (in $$m^3/hr$$) into a reservoir, and suppose the grap

Medium

Implicit Differentiation and Integration Verification

Consider the equation $$\ln(x+y)=x*y.$$ Answer the following parts:

Extreme

Modeling Savings with a Geometric Sequence

A person makes annual deposits into a savings account such that the first deposit is $100 and each s

Medium

Motion Analysis from Velocity Data

A particle moves along a straight line with the following velocity data (in m/s) recorded at specifi

Medium

Net Change Calculation

The net change in a quantity $$Q$$ is modeled by the rate function $$\frac{dQ}{dt}=e^{t}-1$$ for $$0

Medium

Particle Motion with Variable Acceleration

A particle moves along a straight line with an acceleration given by $$a(t)=6-4*t$$ (in m/s²) for $$

Hard

Population Growth in a Bacterial Culture

A bacterial culture grows at a rate given by $$r(t)=0.5*e^{-0.3*t}$$ (in thousands of bacteria per h

Easy

Rainfall Accumulation via Integration

A region experiences rain where the rate of rainfall (in inches per hour) is given by $$r(t)=0.5+0.2

Easy

Temperature Change Over Time

A region experiences a temperature change over time that is modeled by the derivative function $$T'(

Easy

Volume of a Solid: Exponential Rotation

Consider the region bounded by the curve $$y=e^{-x}$$, the x-axis, and the vertical lines $$x=0$$ an

Medium
Unit 7: Differential Equations

Area Under a Differential Equation Curve

Consider the differential equation $$\frac{dy}{dx} = y(1-y)$$, with a particular solution given by $

Medium

Charging of a Capacitor

The voltage $$V$$ (in volts) across a capacitor being charged in an RC circuit is recorded over time

Medium

Combined Cooling and Slope Field Problem

A cooling process is modeled by the equation $$\frac{d\theta}{dt}=-0.07\,\theta$$ where $$\theta(t)=

Medium

Cooling of Electronic Components

After shutdown, the temperature $$T$$ (in °C) of an electronic component is recorded over time (in s

Hard

Cooling with a Time-Dependent Coefficient

A substance cools according to $$\frac{dT}{dt} = -k(t)(T-25)$$ where the cooling coefficient is give

Extreme

Drug Infusion and Elimination

The concentration of a drug in a patient's bloodstream is modeled by the differential equation $$\fr

Easy

Economic Decay Model

An asset depreciates in value according to the model $$\frac{dC}{dt}=-rC$$, where $$C$$ is the asset

Hard

Epidemic Spread (Simplified Logistic Model)

In a simplified model of an epidemic, the number of infected individuals $$I(t)$$ (in thousands) is

Hard

Epidemic Spread Modeling

An epidemic in a closed population of 1000 individuals is modeled by the logistic equation $$\frac{d

Hard

Exact Differential Equation

Consider the differential equation written in differential form: $$(2*x*y + y^2)\,dx + (x^2 + 2*x*y)

Hard

Exponential Growth: Separable Equation

Solve the differential equation $$\frac{dy}{dx} = \frac{y}{1+x^2}$$ with the initial condition $$y(0

Easy

Falling Object with Air Resistance

A falling object with mass $$m=70\,kg$$ is subject to gravity and a resistive force proportional to

Easy

Implicit Differentiation of a Transcendental Equation

Consider the equation $$e^{x*y} + y^3= x$$. Answer the following:

Hard

Implicit Solution of a Differential Equation

The differential equation $$\frac{dy}{dx} = \frac{2x}{1+y^2}$$ requires an implicit solution.

Medium

Investment Growth with Continuous Contributions

An investment account grows continuously with an annual interest rate of 5% while continuous deposit

Medium

Linear Differential Equation with Constant Forcing

Consider the differential equation $$\frac{dy}{dt}=3*y + 6$$ with the initial condition $$y(0)=2$$.

Easy

Logistic Growth Model Analysis

A population $$y(t)$$ grows according to the logistic differential equation $$\frac{dy}{dt} = k * y

Hard

Logistic Population Growth

A population of organisms is modeled by the logistic differential equation $$\frac{dP}{dt}=rP\left(1

Medium

Mixing Problem in a Tank

A tank initially contains 100 liters of brine with 10 kg of dissolved salt. Brine with a concentrati

Medium

Mixing Problem: Salt in a Tank

A 100-liter tank initially contains 50 grams of salt. Brine with a salt concentration of $$0.5$$ gra

Medium

Modeling Continuous Compound Interest

An account accrues interest continuously according to the differential equation $$\frac{dA}{dt}=rA$$

Easy

Modeling Cooling with Newton's Law

An object is cooling in a room where the ambient temperature remains constant at $$20^\circ C$$. The

Medium

Motion Along a Curve with Implicit Differentiation

A particle moves along the curve defined by $$x^2+ y^2- 2*x*y= 1$$. At a certain instant, its horizo

Medium

Newton's Law of Cooling

A hot object is placed in a room with constant temperature $$20^\circ C$$. Its temperature $$T$$ sat

Medium

Newton's Law of Cooling with Temperature Data

A thermometer records the temperature of an object cooling in a room. The object's temperature $$T(t

Medium

Oil Spill Cleanup Dynamics

To mitigate an oil spill, a cleanup system is employed that reduces the volume of oil in contaminate

Medium

Qualitative Analysis of a Nonlinear Differential Equation

Consider the differential equation $$\frac{dy}{dx}=1-y^2$$.

Easy

RC Circuit Discharge

In an RC circuit, the voltage across a capacitor discharging through a resistor follows $$\frac{dV}{

Easy

Related Rates: Conical Tank Filling

Water is pumped into a conical tank at a rate of $$3$$ m$^3$/min. The tank has a height of $$4$$ m a

Medium

Related Rates: Shadow Length

A 2 m tall lamp post casts a shadow of a 1.8 m tall person who is walking away from the lamp post at

Easy

Separable Differential Equation involving $$y^{1/3}$$

Consider the differential equation $$\frac{dy}{dx} = y^{1/3}$$ with the initial condition $$y(8)=27$

Medium

Slope Field and Integrating Factor Analysis

Consider the differential equation $$\frac{dy}{dx}= y - x$$. A slope field for this equation is prov

Hard

Slope Field and Solution Curve Analysis

Consider the differential equation $$\frac{dy}{dx} = x - y$$. A slope field is provided for this equ

Medium

Solving a Differential Equation Using the SIPPY Method

Solve the differential equation $$\frac{dy}{dx}=4*x^3*e^{-y}$$ with the initial condition $$y(1)=0$$

Medium

Water Level in a Reservoir

A reservoir's water volume $$V$$ (in million m³) is measured at various times $$t$$ (in days) as sho

Medium
Unit 8: Applications of Integration

Accumulated Nutrient Intake from a Drip

A medical nutrient drip administers a nutrient at a variable rate given by $$N(t)=-0.03*t^2+1.5*t+20

Medium

Area Between a Cubic and a Linear Function

Consider the functions $$f(x)=x^3-3*x$$ and $$g(x)=x$$. Use integration to determine the area of the

Hard

Area Between a Parabola and a Line

Consider the functions $$f(x)=5*x-x^2$$ and $$g(x)=x$$. A set of experimental data provided the foll

Medium

Average Speed from Variable Acceleration

A car accelerates along a straight road with acceleration given by $$a(t)=2*t-1$$ (in m/s²) for $$t\

Medium

Average Temperature Analysis

A meteorologist recorded the temperature (in $$^\circ C$$) over a 24-hour period at different times.

Easy

Average Temperature Analysis

A local weather station recorded the temperature throughout a day using the model $$T(t)=-0.5*t+35$$

Easy

Average Temperature of a Cooling Liquid

The temperature of a cooling liquid is modeled by $$T(t)=50*e^{-0.1*t}+20$$ (in $$^\circ C$$) for $$

Medium

Comparing Sales Projections

A company’s projected sales (in thousands of dollars) are modeled by the function $$f(x)=5*x-x^2$$ w

Medium

Consumer Surplus Calculation

The demand and supply for a product are given by $$p_d(x)=20-0.5*x$$ and $$p_s(x)=10+0.2*x$$ respect

Hard

Discontinuities in a Piecewise Function

Consider the function $$f(x)=\begin{cases} \frac{\sin(x)}{x} & \text{if } x \neq 0 \\ 2 & \text{if }

Easy

Displacement from a Velocity Graph

A moving object has its velocity given as a function of time. A velocity versus time graph is provid

Medium

Implicit Differentiation in an Economic Equilibrium Model

In an economics model, the relationship between price $$p$$ and quantity $$q$$ is given implicitly b

Medium

Implicit Differentiation in an Electrical Circuit

In an electrical circuit, the voltage $$V$$ and current $$I$$ are related by the equation $$V^2 + (3

Hard

Kinematics with Variable Acceleration

A particle is moving along a straight path with an acceleration given by $$a(t)=10-6*t$$ (in m/s²) f

Hard

Loaf Volume Calculation: Rotated Region

Consider the region bounded by $$y=\sqrt{x}$$ and $$y=\frac{x}{2}$$ for 0 ≤ x ≤ 4. This region is ro

Hard

Manufacturing Profit with Variable Rates

A manufacturer’s profit rate as a function of time (in hours) is given by $$P(t)=100\left(1-e^{-0.2*

Medium

Modeling Bacterial Growth

A bacterial culture grows at a rate modeled by $$g(t)=a*e^{0.3*t}$$, where $$t$$ is time in hours an

Medium

Net Change and Total Distance in Particle Motion

A particle has acceleration $$a(t)=12-8*t$$ (in $$m/s^2$$) for $$t \ge 0$$, with initial velocity $$

Hard

Net Change in Biological Population

A species' population changes at a rate given by $$P'(t)=0.5e^{-0.2*t}-0.05$$ (in thousands per year

Hard

Particle Motion Along a Straight Line

A particle moves along a straight line with acceleration given by $$a(t)=6-4*t$$ (in m/s²) for $$t \

Medium

Particle Motion on a Parametric Path

A particle moves along a path given by the parametric equations $$x(t)= t^2 - t$$ and $$y(t)= 3*t -

Hard

Piecewise Function Analysis

Consider a piecewise function defined by: $$ f(x)=\begin{cases} 3 & \text{for } 0 \le x < 2, \\ -x+5

Medium

Population Growth Rate Analysis

Suppose the instantaneous growth rate of a population is given by $$r(t)=0.04 - 0.002*t$$ for $$t \i

Medium

Population Model Using Exponential Function

A bacteria population is modeled by $$P(t)=100*e^{0.03*t} - 20$$, where $$t$$ is measured in hours.

Hard

Related Rates: Shadow Length Change

A 2-meter tall lamp post casts a shadow of a moving 1.7-meter tall person. Let $$x$$ be the distance

Easy

Revenue Optimization via Integration

A company’s revenue is modeled by $$R(t)=1000-50*t+2*t^2$$ (in dollars per hour), where $$t$$ (in ho

Medium

River Discharge Analysis

The flow rate of a river is modeled by $$Q(t)=20+5*\sin\left(\frac{\pi*t}{12}\right)$$ (in cubic met

Easy

Temperature Increase in a Chemical Reaction

During a chemical reaction, the rate of temperature increase per minute follows an arithmetic sequen

Easy

Total Distance from a Runner's Variable Velocity

A runner’s velocity (in m/s) is modeled by the function $$v(t)=t^2-10*t+16$$ for $$0 \le t \le 10$$

Medium

Volume of a Solid of Revolution using Shells

Consider the region under the curve $$f(x)=e^{-x}$$ for $$x \in [0,1]$$. This region is revolved abo

Medium

Water Flow in a River: Average Velocity and Flow Rate

A river has a width of 10 meters. The velocity of the water at a distance $$x$$ (in meters) from one

Medium

Work Done by a Variable Force

A variable force $$F(x)$$ (in Newtons) acts on an object as it moves along a straight line from $$x=

Hard

Work Done by a Variable Force

A variable force is applied along a straight line such that $$F(x)=6-0.5*x$$ (in Newtons). The force

Easy

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Where can I find practice free response questions for the AP Calculus AB exam?
The free response section of each AP exam varies slightly, so you’ll definitely want to practice that before stepping into that exam room. Here are some free places to find practice FRQs :
  • Of course, make sure to run through College Board's past FRQ questions!
  • Once you’re done with those go through all the questions in the AP Calculus ABFree Response Room. You can answer the question and have it grade you against the rubric so you know exactly where to improve.
  • Reddit it also a great place to find AP free response questions that other students may have access to.
How do I practice for AP AP Calculus AB Exam FRQs?
Once you’re done reviewing your study guides, find and bookmark all the free response questions you can find. The question above has some good places to look! while you’re going through them, simulate exam conditions by setting a timer that matches the time allowed on the actual exam. Time management is going to help you answer the FRQs on the real exam concisely when you’re in that time crunch.
What are some tips for AP Calculus AB free response questions?
Before you start writing out your response, take a few minutes to outline the key points you want to make sure to touch on. This may seem like a waste of time, but it’s very helpful in making sure your response effectively addresses all the parts of the question. Once you do your practice free response questions, compare them to scoring guidelines and sample responses to identify areas for improvement. When you do the free response practice on the AP Calculus AB Free Response Room, there’s an option to let it grade your response against the rubric and tell you exactly what you need to study more.
How do I answer AP Calculus AB free-response questions?
Answering AP Calculus AB free response questions the right way is all about practice! As you go through the AP AP Calculus AB Free Response Room, treat it like a real exam and approach it this way so you stay calm during the actual exam. When you first see the question, take some time to process exactly what it’s asking. Make sure to also read through all the sub-parts in the question and re-read the main prompt, making sure to circle and underline any key information. This will help you allocate your time properly and also make sure you are hitting all the parts of the question. Before you answer each question, note down the key points you want to hit and evidence you want to use (where applicable). Once you have the skeleton of your response, writing it out will be quick, plus you won’t make any silly mistake in a rush and forget something important.