Question

How do I find the derivative of a function at a given point?

Answer 1

First you have to calculate the derivative of the function.

`f(x)=x^3`

`f'(x)=3x^2`

Then if we want to find the derivative of `f(x)` when `x=4` then we substitute that value into `f'(x)`.

`f'(4)=3(4)^2=3*16=48`