Question

if f(x)=4x^2 - 2x + 9, find f(1).
f(1)= (simplify your answer.)

Explanation:

Step1: Differentiate f(x)

$f'(x)=\frac{d}{dx}(4x^{2}-2x + 9)=8x-2$

Step2: Substitute x = 1

$f'(1)=8\times1 - 2$

Answer:

6