log(1 + x)
Let .
The derivative of is .
Then, apply the chain rule. Multiply by :
Differentiate term by term:
The derivative of the constant is zero.
Apply the power rule: goes to
The result is:
The result of the chain rule is:
The answer is:
1 ----- 1 + x
-1 -------- 2 (1 + x)
2 -------- 3 (1 + x)