-x x
x^(-x)
Don't know the steps in finding this derivative.
But the derivative is
The answer is:
-x x *(-1 - log(x))
-x / 2 1\ x *|(1 + log(x)) - -| \ x/
-x /1 3 3*(1 + log(x))\ x *|-- - (1 + log(x)) + --------------| | 2 x | \x /