Integral de (absolute(x)+1)*cos(nx) dx
Solución
Respuesta (Indefinida)
[src]
/ / // x for n = 0\
| | || |
| (|x| + 1)*cos(n*x) dx = C + | |x|*cos(n*x) dx + |
$$\int \left(\left|{x}\right| + 1\right) \cos{\left(n x \right)}\, dx = C + \begin{cases} x & \text{for}\: n = 0 \\\frac{\sin{\left(n x \right)}}{n} & \text{otherwise} \end{cases} + \int \cos{\left(n x \right)} \left|{x}\right|\, dx$$
/ 2 2*sin(pi*n) 2*cos(pi*n) 2*pi*sin(pi*n)
|- -- + ----------- + ----------- + -------------- for And(n > -oo, n < oo, n != 0)
| 2 n 2 n
< n n
|
| 2
\ pi + 2*pi otherwise
$$\begin{cases} \frac{2 \sin{\left(\pi n \right)}}{n} + \frac{2 \pi \sin{\left(\pi n \right)}}{n} + \frac{2 \cos{\left(\pi n \right)}}{n^{2}} - \frac{2}{n^{2}} & \text{for}\: n > -\infty \wedge n < \infty \wedge n \neq 0 \\2 \pi + \pi^{2} & \text{otherwise} \end{cases}$$
=
/ 2 2*sin(pi*n) 2*cos(pi*n) 2*pi*sin(pi*n)
|- -- + ----------- + ----------- + -------------- for And(n > -oo, n < oo, n != 0)
| 2 n 2 n
< n n
|
| 2
\ pi + 2*pi otherwise
$$\begin{cases} \frac{2 \sin{\left(\pi n \right)}}{n} + \frac{2 \pi \sin{\left(\pi n \right)}}{n} + \frac{2 \cos{\left(\pi n \right)}}{n^{2}} - \frac{2}{n^{2}} & \text{for}\: n > -\infty \wedge n < \infty \wedge n \neq 0 \\2 \pi + \pi^{2} & \text{otherwise} \end{cases}$$
Piecewise((-2/n^2 + 2*sin(pi*n)/n + 2*cos(pi*n)/n^2 + 2*pi*sin(pi*n)/n, (n > -oo)∧(n < oo)∧(Ne(n, 0))), (pi^2 + 2*pi, True))
Estos ejemplos se pueden aplicar para introducción de los límites de integración inferior y superior.