Question

Approximate the instantaneous rate of change for the functions.
f(x)=-2x^2+x+4 at x=4

Answer 1

Isn't this just finding slope?

Answer 2

Do I find the derivative of -2x^2

Answer 3

Differentiate the function -2x^2+x+4
Then place x=4 into the derivative

Answer 4

(a*b)'=a'*b+a*b', and let a=-2, b=x^2