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