log(1 + x)
Let u=x+1u = x + 1u=x+1.
The derivative of log(u)\log{\left(u \right)}log(u) is 1u\frac{1}{u}u1.
Then, apply the chain rule. Multiply by ddx(x+1)\frac{d}{d x} \left(x + 1\right)dxd(x+1):
Differentiate x+1x + 1x+1 term by term:
The derivative of the constant 111 is zero.
Apply the power rule: xxx goes to 111
The result is: 111
The result of the chain rule is:
The answer is:
1 ----- 1 + x
-1 -------- 2 (1 + x)
2 -------- 3 (1 + x)