Question

PLEASE HELP WILL GIVE A MEDAL
Find the derivative of f(x) = -7/x at x = -3.

Answer 1

\((\dfrac{-7}{x})'=?\)

Answer 2

the derivative is 7/x^2

Answer 3

so replace -3 you get 7/9

Answer 4

please apply this rule:
\[\frac{ d }{ dx }\left( \frac{ 1 }{ x } \right)=-\frac{ 1 }{ x ^{2} }\]