3 x -- x E
x^3/E^x
Apply the quotient rule, which is:
and .
To find :
Apply the power rule: goes to
The derivative of is itself.
Now plug in to the quotient rule:
Now simplify:
The answer is:
3 -x 2 -x - x *e + 3*x *e
/ 2 \ -x x*\6 + x - 6*x/*e
/ 3 2\ -x \6 - x - 18*x + 9*x /*e