Question

Find the derivative of f(x) = -11 / x at x = 9.

Answer 1

Alright so same thing here

\[\large f(x) = -\frac{11}{x}\]
\[\large f'(x) = \frac{11}{x^2}\]

and plug in your 9 for 'x'

Answer 2

11/81

Answer 3

Correct....but do you see how I got the derivative there?

Answer 4

square it?