Mister Exam

Integral of xe^(4x) dx

Limits of integration:

from to
v

The graph:

from to

Piecewise:

The solution

You have entered [src]
  1          
  /          
 |           
 |     4*x   
 |  x*e    dx
 |           
/            
0            
$$\int\limits_{0}^{1} x e^{4 x}\, dx$$
Integral(x*E^(4*x), (x, 0, 1))
Detail solution
  1. Use integration by parts:

    Let and let .

    Then .

    To find :

    1. There are multiple ways to do this integral.

      Method #1

      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:

      Method #2

      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 a constant is the constant times the variable of integration:

          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:

  3. Now simplify:

  4. Add the constant of integration:


The answer is:

The answer (Indefinite) [src]
  /                             
 |                  4*x      4*x
 |    4*x          e      x*e   
 | x*e    dx = C - ---- + ------
 |                  16      4   
/                               
$${{\left(4\,x-1\right)\,e^{4\,x}}\over{16}}$$
The graph
The answer [src]
        4
1    3*e 
-- + ----
16    16 
$${{3\,e^4}\over{16}}+{{1}\over{16}}$$
=
=
        4
1    3*e 
-- + ----
16    16 
$$\frac{1}{16} + \frac{3 e^{4}}{16}$$
Numerical answer [src]
10.2996531312145
10.2996531312145
The graph
Integral of xe^(4x) dx

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