Let .
Apply the power rule: goes to
Then, apply the chain rule. Multiply by :
Differentiate term by term:
Apply the power rule: goes to
The derivative of the constant is zero.
The result is:
The result of the chain rule is:
Now simplify:
The answer is:
2 x ----------- 2/3 / 3 \ \x + 1/
/ 3 \ | x | 2*x*|1 - ------| | 3| \ 1 + x / ---------------- 2/3 / 3\ \1 + x /
/ 3 6 \ | 6*x 5*x | 2*|1 - ------ + ---------| | 3 2| | 1 + x / 3\ | \ \1 + x / / -------------------------- 2/3 / 3\ \1 + x /