Question

find the derivative:

w = z^-4 - 1/z

Answer 1

w' = -4z^-5 +z^-2

Answer 2

why is it z\[^{-2}\]

Answer 3

-1/z is really just -1z^-1, so the when you subtract -1 by 1 when you take the derivative you get -2 in the power.

Answer 4

MAD!! thank u heaps :)