Let .
Apply the power rule: goes to
Then, apply the chain rule. Multiply by :
The derivative of is .
The result of the chain rule is:
The answer is:
7
9*log (x)*(8 - log(x))
----------------------
2
x
6 / 2 \
18*log (x)*\28 + log (x) - 12*log(x)/
-------------------------------------
3
x