Mister Exam

Derivative of log(x-1)

Function f() - derivative -N order at the point
v

The graph:

from to

Piecewise:

The solution

You have entered [src]
log(x - 1)
$$\log{\left(x - 1 \right)}$$
d             
--(log(x - 1))
dx            
$$\frac{d}{d x} \log{\left(x - 1 \right)}$$
Detail solution
  1. Let .

  2. The derivative of is .

  3. Then, apply the chain rule. Multiply by :

    1. Differentiate term by term:

      1. Apply the power rule: goes to

      2. The derivative of the constant is zero.

      The result is:

    The result of the chain rule is:

  4. Now simplify:


The answer is:

The graph
The first derivative [src]
  1  
-----
x - 1
$$\frac{1}{x - 1}$$
The second derivative [src]
   -1    
---------
        2
(-1 + x) 
$$- \frac{1}{\left(x - 1\right)^{2}}$$
The third derivative [src]
    2    
---------
        3
(-1 + x) 
$$\frac{2}{\left(x - 1\right)^{3}}$$
The graph
Derivative of log(x-1)