How do you find the instantaneous rate of

Jayleen Aguirre

Jayleen Aguirre

Answered question

2022-04-17

How do you find the instantaneous rate of change of f(x)=x22x+4 at x=-1

Answer & Explanation

unduncjineei5r3

unduncjineei5r3

Beginner2022-04-18Added 19 answers

You evaluate the derivative of your function then substitute the value of x in it:
Derivative (quotient Rule)
f(x)=2x(x+4)(x22)(x+4)2
=2x2+8xx2+2(x+4)2=x2+8x+2(x+4)2
Substitute x=-1
f(1)=18+2(1+4)2=59

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