Mister Exam

Derivative of ln^2(x)

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

The graph:

from to

Piecewise:

The solution

You have entered [src]
   2   
log (x)
log(x)2\log{\left(x \right)}^{2}
log(x)^2
Detail solution
  1. Let u=log(x)u = \log{\left(x \right)}.

  2. Apply the power rule: u2u^{2} goes to 2u2 u

  3. Then, apply the chain rule. Multiply by ddxlog(x)\frac{d}{d x} \log{\left(x \right)}:

    1. The derivative of log(x)\log{\left(x \right)} is 1x\frac{1}{x}.

    The result of the chain rule is:

    2log(x)x\frac{2 \log{\left(x \right)}}{x}


The answer is:

2log(x)x\frac{2 \log{\left(x \right)}}{x}

The graph
02468-8-6-4-2-1010-5050
The first derivative [src]
2*log(x)
--------
   x    
2log(x)x\frac{2 \log{\left(x \right)}}{x}
The second derivative [src]
2*(1 - log(x))
--------------
       2      
      x       
2(1log(x))x2\frac{2 \left(1 - \log{\left(x \right)}\right)}{x^{2}}
The third derivative [src]
2*(-3 + 2*log(x))
-----------------
         3       
        x        
2(2log(x)3)x3\frac{2 \left(2 \log{\left(x \right)} - 3\right)}{x^{3}}
The graph
Derivative of ln^2(x)