Integral de (pi-2x)*cos((2*pi*n*x)/(2*pi)) dx
Solución
Respuesta (Indefinida)
[src]
// 2 \
|| x |
|| -- for n = 0|
/ || 2 |
| || | // x for n = 0\ // x for n = 0\
| /2*pi*n*x\ ||/-cos(n*x) | || | || |
| (pi - 2*x)*cos|--------| dx = C + 2*|<|---------- for n != 0 | + pi*|
∫ ( π − 2 x ) cos ( x 2 π n 2 π ) d x = C − 2 x ( { x for n = 0 sin ( n x ) n otherwise ) + π ( { x for n = 0 sin ( n x ) n otherwise ) + 2 ( { x 2 2 for n = 0 { − cos ( n x ) n for n ≠ 0 0 otherwise n otherwise ) \int \left(\pi - 2 x\right) \cos{\left(\frac{x 2 \pi n}{2 \pi} \right)}\, dx = C - 2 x \left(\begin{cases} x & \text{for}\: n = 0 \\\frac{\sin{\left(n x \right)}}{n} & \text{otherwise} \end{cases}\right) + \pi \left(\begin{cases} x & \text{for}\: n = 0 \\\frac{\sin{\left(n x \right)}}{n} & \text{otherwise} \end{cases}\right) + 2 \left(\begin{cases} \frac{x^{2}}{2} & \text{for}\: n = 0 \\\frac{\begin{cases} - \frac{\cos{\left(n x \right)}}{n} & \text{for}\: n \neq 0 \\0 & \text{otherwise} \end{cases}}{n} & \text{otherwise} \end{cases}\right) ∫ ( π − 2 x ) cos ( 2 π x 2 πn ) d x = C − 2 x ( { x n s i n ( n x ) for n = 0 otherwise ) + π ( { x n s i n ( n x ) for n = 0 otherwise ) + 2 ⎩ ⎨ ⎧ 2 x 2 n { − n c o s ( n x ) 0 for n = 0 otherwise for n = 0 otherwise
/2 2*cos(2*pi*n) 3*pi*sin(2*pi*n)
|-- - ------------- - ---------------- for And(n > -oo, n < oo, n != 0)
| 2 2 n
{ − 3 π sin ( 2 π n ) n − 2 cos ( 2 π n ) n 2 + 2 n 2 for n > − ∞ ∧ n < ∞ ∧ n ≠ 0 − 2 π 2 otherwise \begin{cases} - \frac{3 \pi \sin{\left(2 \pi n \right)}}{n} - \frac{2 \cos{\left(2 \pi n \right)}}{n^{2}} + \frac{2}{n^{2}} & \text{for}\: n > -\infty \wedge n < \infty \wedge n \neq 0 \\- 2 \pi^{2} & \text{otherwise} \end{cases} { − n 3 π s i n ( 2 πn ) − n 2 2 c o s ( 2 πn ) + n 2 2 − 2 π 2 for n > − ∞ ∧ n < ∞ ∧ n = 0 otherwise
=
/2 2*cos(2*pi*n) 3*pi*sin(2*pi*n)
|-- - ------------- - ---------------- for And(n > -oo, n < oo, n != 0)
| 2 2 n
{ − 3 π sin ( 2 π n ) n − 2 cos ( 2 π n ) n 2 + 2 n 2 for n > − ∞ ∧ n < ∞ ∧ n ≠ 0 − 2 π 2 otherwise \begin{cases} - \frac{3 \pi \sin{\left(2 \pi n \right)}}{n} - \frac{2 \cos{\left(2 \pi n \right)}}{n^{2}} + \frac{2}{n^{2}} & \text{for}\: n > -\infty \wedge n < \infty \wedge n \neq 0 \\- 2 \pi^{2} & \text{otherwise} \end{cases} { − n 3 π s i n ( 2 πn ) − n 2 2 c o s ( 2 πn ) + n 2 2 − 2 π 2 for n > − ∞ ∧ n < ∞ ∧ n = 0 otherwise
Piecewise((2/n^2 - 2*cos(2*pi*n)/n^2 - 3*pi*sin(2*pi*n)/n, (n > -oo)∧(n < oo)∧(Ne(n, 0))), (-2*pi^2, True))
Estos ejemplos se pueden aplicar para introducción de los límites de integración inferior y superior.