Let .
Apply the power rule: goes to
Then, apply the chain rule. Multiply by :
Let .
The derivative of is .
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:
The result of the chain rule is:
Now simplify:
The answer is:
10
11*log (x + 10)
----------------
x + 10
9
11*log (10 + x)*(10 - log(10 + x))
----------------------------------
2
(10 + x)
8 / 2 \
22*log (10 + x)*\45 + log (10 + x) - 15*log(10 + x)/
----------------------------------------------------
3
(10 + x)