Question

Find
`f'(4)` if
`f(x)=2x^2-3`
Explain how you got your answer.

Answer 1

Plug 4 in for x. 2(4)^2 - 3 which equals 29

Answer 2

`f'(4)=16`

Explanation:

First, we need to find the derivative:

`f'(x)=(2)(2)x^(^2^-^1^)-0`

`f'(x)=4x`

Now, we need to plug in 4 for x:

`f'(4)=(4)(4)=16`