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disk volume formula
Volume = π r2 Δx
washer volume formula
Volume = (π R2 - π r2) Δx
cylindrical shell volume formula
2π r h Δx
disk method slices
vertical
washer method slices
vertical
cylindrical shell method slices
horizontal
disk method traits
solid (not hollow)
dx for HORIZONTAL axis of rotation
dy for VERTICAL axis of rotation
washer method traits
hollow
dx for HORIZONTAL axis of rotation
dy for VERTICAL axis of rotation
cylindrical shell method traits
either solid or hollow
dy for VERTICAL axis of rotation
dx for HORIZONTAL axis of rotation
probability definition
probability density function
probability that x lies in an interval [a, b]
median value of x
number M such that
mean value of x or the expected value of x
Comparison Theorem
0 ≤ f (x) ≤ g(x)
Comparison Theorem warnings
1/x converge or diverve?
diverge
1/x² converge or diverge?
converge
1/x³ converge or diverge?
converge (check)
trapezoidal sum formula
left- and right-hand sum formulas
Error in Numerical Approximations (trapezoid & midpoint)
mid point sum formula
Error Bounds in Numerical Approximations (left and right hand sums)
work formula
work = mgh
limit definition of an integral
∆x
xk
p-integral rule
if p = 1
function diverges
product rule
triangle inequality
circle formula
add later: common derivatives, similar triangles, improper integrals, & steps for common problems