Integral de e^(-ax)*cosbxdx dx
Solución
Respuesta (Indefinida)
[src]
// x for And(a = 0, b = 0)\
|| |
|| I*b*x I*b*x I*b*x |
|| x*cos(b*x)*e e *sin(b*x) I*x*e *sin(b*x) |
|| ----------------- + --------------- - ------------------- for a = -I*b |
/ || 2 2*b 2 |
| || |
| -a*x || -I*b*x -I*b*x -I*b*x |
| E *cos(b*x) dx = C + |
∫e−axcos(bx)dx=C+⎩⎨⎧x−2ixeibxsin(bx)+2xeibxcos(bx)+2beibxsin(bx)2ixe−ibxsin(bx)+2xe−ibxcos(bx)+2be−ibxsin(bx)−a2eax+b2eaxacos(bx)+a2eax+b2eaxbsin(bx)fora=0∧b=0fora=−ibfora=ibotherwise
/ 1
| ---------- for And(2*|arg(b)| = 0, 2*|arg(a)| < pi)
| / 2\
| | b |
| a*|1 + --|
| | 2|
| \ a /
|
< oo
| /
| |
| | -a*x
| | cos(b*x)*e dx otherwise
| |
|/
|0
\
⎩⎨⎧a(1+a2b2)10∫∞e−axcos(bx)dxfor2∣arg(b)∣=0∧2∣arg(a)∣<πotherwise
=
/ 1
| ---------- for And(2*|arg(b)| = 0, 2*|arg(a)| < pi)
| / 2\
| | b |
| a*|1 + --|
| | 2|
| \ a /
|
< oo
| /
| |
| | -a*x
| | cos(b*x)*e dx otherwise
| |
|/
|0
\
⎩⎨⎧a(1+a2b2)10∫∞e−axcos(bx)dxfor2∣arg(b)∣=0∧2∣arg(a)∣<πotherwise
Piecewise((1/(a*(1 + b^2/a^2)), (2*Abs(arg(b)) = 0))∧(2*Abs(arg(a)) < pi), (Integral(cos(b*x)*exp(-a*x), (x, 0, oo)), True))
Estos ejemplos se pueden aplicar para introducción de los límites de integración inferior y superior.