Question

PLEASE HELP!!! MEDAL WILL BE REWARDED!!!
Find the derivative of f(x) =-9/x at x = -8.

I think it is 9/8 but I am unsure...

Answer 1

set x^-1

Answer 2

if you know the derivative of \(\frac{1}{x}\) is \(-\frac{1}{x^2}\) then this is easy
if you have to do it by hand, which is my guess, then you have some work to do

Answer 3

So its 9/64? @satellite73

Answer 4

yes

Answer 5

correct

Answer 6

Oh okay thanks you so much!!!

Answer 7

Would it be the opposite way around?

Answer 8

oops ignore me you are right

Answer 9

\(\frac{9}{64}\) is correct

Answer 10

Oh okay thanks again! I have more questions im asking now!!

Answer 11

i think she's right derivative would be 9/x^2 so at -8 the derivative is 9/64

Answer 12

ignore me lol