Let f,g be differentiable. Let F(x) = f(x)g(x). Then
F'(x)=g'(x)f(x)+f'(x)g(x)
Back
Quotient Rule
Front
Let f,g be differentiable. Let F(x)=f(x)/g(x). Then
F'(x)=(g(x)f'(x)-f(x)g'(x))/[g(x)]^2
Back
tangent line at x=a
Front
The tangent line of f(x) at x =a is a line passing through (a, f(a)) with slope f'(a).
Back
differentiable on (a,b)
Front
A function f(x) is differentiable on (a,b) if f'(c) exists for all c E (a,b).
Back
Implicit Differentiation
Front
The process of finding the derivative of an equation in two variables.
Back
second derivative
Front
The derivative of the first derivative is called the second derivative.
Back
height of a free falling object
Front
An object on Earth is released from a height hsub0 in ft with an initial velocity of vsub0 in ft/sec. Then the height of a free-falling object in ft after t seconds can be approximated by -16t^2+vsub0t+hsub0
Back
secant line
Front
for a function f(x), any line that passes through two points on the curve is a secant line
Back
derivative
Front
the derivative of f(x) with respect to x at x=a is given by f'(x)=lim as x approaches a of f(x)-f(a)/x-a provided the limit exists
or
in general the derivative of f(x) is given by f'(x)=lim as h approaches 0 of f(x+h)-f(x)/h provided the limit exists
Back
Chain Rule
Front
let h(x)=f of g= f(g(x) where f, g be differentiable with respect to x. Then
h'(x)= f'(g(x))(g'(x))