Question

PLEASE HELP WILL GIVE A MEDAL
Find the derivative of f(x) = 5/x at x = -1.

Answer 1

rewrite it in index form

\[f(x) = 5x^{-1}\]

now find the derivative

Answer 2

And remember the power rule: \(x^n = nx^{n-1}\) where \(n\) is the power.

Answer 3

@satellite73 how do i do this?

Answer 4

Have you attempted it ?

Answer 5

\[f'(x)=5(-1)x ^{-2}=\frac{ ? }{ ? } \]

Answer 6

put x=-1 to find f(-1)