Question

Find the derivative of f(x) = 8/x at x = -1.

Answer 1

@mebs

Answer 2

i did what you showed me before and got 8

Answer 3

Almost.

Answer 4

-8?

Answer 5

^_^

Answer 6

Do what I did before. bring that x up and just the first principle and than simplify.\[step 1) f(x) = 8(x)^{-1}\]

\[Step 2) f'(x) = 8(-1)x^{-1 -1}\]
\[Step 3) f'(x) = \frac{-8}{x^{2}}\]

Answer 7

awesome, i got it, -8

Answer 8

Good. Just that step process until you can do it in the blink of an eye.

Answer 9

ok awesome, thanks