Integral of (x³-2x) dx

The solution

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-1

$$\int\limits_{-1}^{2} \left(x^{3} - 2 x\right)\, dx$$

Integral(x^3 - 2*x, (x, -1, 2))

Detail solution

Integrate term-by-term:
1. The integral of $x^{n}$ is $\frac{x^{n + 1}}{n + 1}$ when $n \neq -1$ :
  
  $\int x^{3}\, dx = \frac{x^{4}}{4}$
1. The integral of a constant times a function is the constant times the integral of the function:
  
  $\int \left(- 2 x\right)\, dx = - 2 \int x\, dx$
  1. The integral of $x^{n}$ is $\frac{x^{n + 1}}{n + 1}$ when $n \neq -1$ :
    
    $\int x\, dx = \frac{x^{2}}{2}$
  So, the result is: $- x^{2}$
The result is: $\frac{x^{4}}{4} - x^{2}$
Add the constant of integration:

$\frac{x^{4}}{4} - x^{2}+ \mathrm{constant}$

The answer is:

$\frac{x^{4}}{4} - x^{2}+ \mathrm{constant}$

The answer (Indefinite) [src]

  /                           
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 | / 3      \           2   x 
 | \x  - 2*x/ dx = C - x  + --
 |                          4 
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$$\int \left(x^{3} - 2 x\right)\, dx = C + \frac{x^{4}}{4} - x^{2}$$

Simplify

The graph

Plot the graph f(x)

The answer [src]

3/4

$$\frac{3}{4}$$

3/4

$$\frac{3}{4}$$

3/4

Numerical answer [src]

0.75

0.75

The graph

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

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Integral of (x³-2x) dx

Limits of integration:

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The solution