Chapter 5 - Definite and Indefinite Integrals - AP Calculus AB

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26 Terms

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linearizing a function

approzimating the function for values of x close to c using the linear function

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local linearity

if f is differentiable at x = c, then the linear function l(x) containing (c, f(c )) w/ slope f’(c ) is a close approximation to the graph of f for values of x close to c

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dx =

change in x

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dy

f’(x)dx

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l(x)

f(c ) + f’(c ) (x-c)

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indefinite integral

g(x) = ∫f(x)dx if and only if g’(x) = f(x)

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K * f(x)dx =

K∫f(x)dx

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(f(x) ± g(x))dx =

∫f(x)dx ± ∫g(x)dx + c

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xn dx =

1/n+1 * xn+1 + C

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exdx

ex + C

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bxdx =

bx * l/ln(b)

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u-substitution

the reverse chain rule for integration, where u = a function/something inside a composition

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riemann sum

Rn = ∑ f(ck)∆xk

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definite integral notation

ba f(x) dx

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the mean value theorem

  1. f is differentiable for all values of x in the open interval (a,b) and..

  2. f is continuous for all values of x in the closed interval [a,b]

then there is at least 1 number x=c in (a.b) such that

f’(c) = (f(b)-f(a))/b-a

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rolles theorem

if

  1. f is differentiable for all values of x in the open interval (a,b) and..

  2. f is continuous for all values of x in the closed interval [a,b] and..

  3. f(a) = f(b) = 0

then there is at least 1 number x=c in (a,b) such that f’(c) = 0

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the fundamental theorem of calculus

if f is an integrable function and if g(x) = ∫f(x)dx then ∫ba f(x)dx = g(b) - g(a)

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ba (f(x) ± g(x))dx =

ba f(x)dx ± ∫ba g(x)dx

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ba K * f(x)dx =

K ∫ba f(x)dx

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ba f(x)dx if a<c<b =

ca f(x)dx + ∫bcf(x)dx

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ab f(x)dx =

-∫ba f(x)dx

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area of a region between two curves

ba (f(x)-g(x)) dx

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average value of a function

= 1/b-a ∫ba f(x)dx

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volume of a solid by plane slicing

V = ∫ba A(x)dx

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the disc method

V = ∫ba π f(x)2dx

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washer method

V = ∫ba π(f(x)2 - g(x)2)