tentukan turunan y=e^1/x^3

Misal u = e maka u' = e

v = x^3 maka v'= 3x^2

y' = (u'.v - u.v')/v^2

y' =( e.x^3 - e.3x^2)/(x^3)^2

y' =[ex^2(x -3)]/x^6

y' = [e(x-3)]/x^4