Mister Exam

Integral of x*ln(x) dx

Limits of integration:

from to
v

The graph:

from to

Piecewise:

The solution

You have entered [src]
  1            
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 |  x*log(x) dx
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$$\int\limits_{0}^{1} x \log{\left(x \right)}\, dx$$
Integral(x*log(x), (x, 0, 1))
Detail solution
  1. There are multiple ways to do this integral.

    Method #1

    1. Let .

      Then let and substitute :

      1. Use integration by parts:

        Let and let .

        Then .

        To find :

        1. Let .

          Then let and substitute :

          1. The integral of a constant times a function is the constant times the integral of the function:

            1. The integral of the exponential function is itself.

            So, the result is:

          Now substitute back in:

        Now evaluate the sub-integral.

      2. The integral of a constant times a function is the constant times the integral of the function:

        1. Let .

          Then let and substitute :

          1. The integral of a constant times a function is the constant times the integral of the function:

            1. The integral of the exponential function is itself.

            So, the result is:

          Now substitute back in:

        So, the result is:

      Now substitute back in:

    Method #2

    1. Use integration by parts:

      Let and let .

      Then .

      To find :

      1. The integral of is when :

      Now evaluate the sub-integral.

    2. The integral of a constant times a function is the constant times the integral of the function:

      1. The integral of is when :

      So, the result is:

  2. Now simplify:

  3. Add the constant of integration:


The answer is:

The answer (Indefinite) [src]
  /                   2    2       
 |                   x    x *log(x)
 | x*log(x) dx = C - -- + ---------
 |                   4        2    
/                                  
$$\int x \log{\left(x \right)}\, dx = C + \frac{x^{2} \log{\left(x \right)}}{2} - \frac{x^{2}}{4}$$
The graph
The answer [src]
-1/4
$$- \frac{1}{4}$$
=
=
-1/4
$$- \frac{1}{4}$$
-1/4
Numerical answer [src]
-0.25
-0.25
The graph
Integral of x*ln(x) dx

    Use the examples entering the upper and lower limits of integration.