Question

Finding the deriv of 4/x^3?
Quotient rule?

Answer 1

\[\Large \frac{1}{x^3}\quad=\quad x^{-3}\]

Answer 2

Quotient rule: That could work, but no need for that. Use @zepdrix 's explanation.

Answer 3

The 4 is just a constant, pull it off to the side.
You certainly COULD apply the quotient rule :) But it's not necessary.

Answer 4

Power Rule from the last form I wrote.