Let .
Apply the power rule: goes to
Then, apply the chain rule. Multiply by :
Apply the power rule: goes to
The result of the chain rule is:
Now simplify:
The answer is:
/ 2/3 \ | 3*|x| 2*sign(x)| 2*|- -------- + ---------| | x 3 _____ | \ \/ |x| / -------------------------- 9*x
/ 2 2/3 \ | sign (x) 6*DiracDelta(x) 9*|x| 6*sign(x)| 4*|- -------- + --------------- + -------- - ---------| | 4/3 3 _____ 2 3 _____| \ |x| \/ |x| x x*\/ |x| / ------------------------------------------------------- 27*x