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Integral de x^2cos(ax) dx

Límites de integración:

interior superior
v

Gráfico:

interior superior

Definida a trozos:

Solución

Ha introducido [src]
  1               
  /               
 |                
 |   2            
 |  x *cos(a*x) dx
 |                
/                 
0                 
$$\int\limits_{0}^{1} x^{2} \cos{\left(a x \right)}\, dx$$
Integral(x^2*cos(a*x), (x, 0, 1))
Respuesta (Indefinida) [src]
                          //                 3                           \                            
                          ||                x                            |                            
                          ||                --                  for a = 0|                            
                          ||                3                            |                            
  /                       ||                                             |                            
 |                        ||/sin(a*x)   x*cos(a*x)                       |      //   x      for a = 0\
 |  2                     |||-------- - ----------  for a != 0           |    2 ||                   |
 | x *cos(a*x) dx = C - 2*|<|    2          a                            | + x *|
            
$$\int x^{2} \cos{\left(a x \right)}\, dx = C + x^{2} \left(\begin{cases} x & \text{for}\: a = 0 \\\frac{\sin{\left(a x \right)}}{a} & \text{otherwise} \end{cases}\right) - 2 \left(\begin{cases} \frac{x^{3}}{3} & \text{for}\: a = 0 \\\frac{\begin{cases} - \frac{x \cos{\left(a x \right)}}{a} + \frac{\sin{\left(a x \right)}}{a^{2}} & \text{for}\: a \neq 0 \\0 & \text{otherwise} \end{cases}}{a} & \text{otherwise} \end{cases}\right)$$
Respuesta [src]
/sin(a)   2*sin(a)   2*cos(a)                                  
|------ - -------- + --------  for And(a > -oo, a < oo, a != 0)
|  a          3          2                                     
<            a          a                                      
|                                                              
|            1/3                          otherwise            
\                                                              
$$\begin{cases} \frac{\sin{\left(a \right)}}{a} + \frac{2 \cos{\left(a \right)}}{a^{2}} - \frac{2 \sin{\left(a \right)}}{a^{3}} & \text{for}\: a > -\infty \wedge a < \infty \wedge a \neq 0 \\\frac{1}{3} & \text{otherwise} \end{cases}$$
=
=
/sin(a)   2*sin(a)   2*cos(a)                                  
|------ - -------- + --------  for And(a > -oo, a < oo, a != 0)
|  a          3          2                                     
<            a          a                                      
|                                                              
|            1/3                          otherwise            
\                                                              
$$\begin{cases} \frac{\sin{\left(a \right)}}{a} + \frac{2 \cos{\left(a \right)}}{a^{2}} - \frac{2 \sin{\left(a \right)}}{a^{3}} & \text{for}\: a > -\infty \wedge a < \infty \wedge a \neq 0 \\\frac{1}{3} & \text{otherwise} \end{cases}$$
Piecewise((sin(a)/a - 2*sin(a)/a^3 + 2*cos(a)/a^2, (a > -oo)∧(a < oo)∧(Ne(a, 0))), (1/3, True))

    Estos ejemplos se pueden aplicar para introducción de los límites de integración inferior y superior.