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

User Mark Cassar
by
2.6k points

2 Answers

9 votes
9 votes
Plug 4 in for x. 2(4)^2 - 3 which equals 29
User Dinesh Patra
by
2.4k points
24 votes
24 votes

Answer:


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

User CJ Harmath
by
2.7k points