Mister Exam

Derivative of 1/ln(x)

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

The graph:

from to

Piecewise:

The solution

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

  2. Apply the power rule: goes to

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

    1. The derivative of is .

    The result of the chain rule is:


The answer is:

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