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 /