oo / | | 3 | x | ------------ dx | 4 | _____ | \/ 2*x + 8 | / 0
Integral(x^3/((sqrt(2*x))^4 + 8), (x, 0, oo))
TrigSubstitutionRule(theta=_theta, func=sqrt(2)*tan(_theta), rewritten=tan(_theta)**3/2, substep=ConstantTimesRule(constant=1/2, other=tan(_theta)**3, substep=RewriteRule(rewritten=(sec(_theta)**2 - 1)*tan(_theta), substep=AlternativeRule(alternatives=[AlternativeRule(alternatives=[URule(u_var=_u, u_func=sec(_theta)**2, constant=1/2, substep=ConstantTimesRule(constant=1/2, other=(_u - 1)/_u, substep=RewriteRule(rewritten=1 - 1/_u, substep=AddRule(substeps=[ConstantRule(constant=1, context=1, symbol=_u), ConstantTimesRule(constant=-1, other=1/_u, substep=ReciprocalRule(func=_u, context=1/_u, symbol=_u), context=-1/_u, symbol=_u)], context=1 - 1/_u, symbol=_u), context=(_u - 1)/_u, symbol=_u), context=(_u - 1)/_u, symbol=_u), context=(sec(_theta)**2 - 1)*tan(_theta), symbol=_theta), URule(u_var=_u, u_func=sec(_theta), constant=1, substep=AlternativeRule(alternatives=[URule(u_var=_u, u_func=_u**2, constant=1/2, substep=ConstantTimesRule(constant=1/2, other=(_u - 1)/_u, substep=RewriteRule(rewritten=1 - 1/_u, substep=AddRule(substeps=[ConstantRule(constant=1, context=1, symbol=_u), ConstantTimesRule(constant=-1, other=1/_u, substep=ReciprocalRule(func=_u, context=1/_u, symbol=_u), context=-1/_u, symbol=_u)], context=1 - 1/_u, symbol=_u), context=(_u - 1)/_u, symbol=_u), context=(_u - 1)/_u, symbol=_u), context=(_u**2 - 1)/_u, symbol=_u), RewriteRule(rewritten=_u - 1/_u, substep=AddRule(substeps=[PowerRule(base=_u, exp=1, context=_u, symbol=_u), ConstantTimesRule(constant=-1, other=1/_u, substep=ReciprocalRule(func=_u, context=1/_u, symbol=_u), context=-1/_u, symbol=_u)], context=_u - 1/_u, symbol=_u), context=(_u**2 - 1)/_u, symbol=_u)], context=(_u**2 - 1)/_u, symbol=_u), context=(sec(_theta)**2 - 1)*tan(_theta), symbol=_theta)], context=(sec(_theta)**2 - 1)*tan(_theta), symbol=_theta), RewriteRule(rewritten=tan(_theta)*sec(_theta)**2 - tan(_theta), substep=AddRule(substeps=[AlternativeRule(alternatives=[URule(u_var=_u, u_func=sec(_theta), constant=1, substep=PowerRule(base=_u, exp=1, context=_u, symbol=_u), context=tan(_theta)*sec(_theta)**2, symbol=_theta), URule(u_var=_u, u_func=tan(_theta), constant=1, substep=PowerRule(base=_u, exp=1, context=_u, symbol=_u), context=tan(_theta)*sec(_theta)**2, symbol=_theta)], context=tan(_theta)*sec(_theta)**2, symbol=_theta), ConstantTimesRule(constant=-1, other=tan(_theta), substep=RewriteRule(rewritten=sin(_theta)/cos(_theta), substep=URule(u_var=_u, u_func=cos(_theta), constant=-1, substep=ConstantTimesRule(constant=-1, other=1/_u, substep=ReciprocalRule(func=_u, context=1/_u, symbol=_u), context=1/_u, symbol=_u), context=sin(_theta)/cos(_theta), symbol=_theta), context=tan(_theta), symbol=_theta), context=-tan(_theta), symbol=_theta)], context=tan(_theta)*sec(_theta)**2 - tan(_theta), symbol=_theta), context=(sec(_theta)**2 - 1)*tan(_theta), symbol=_theta), RewriteRule(rewritten=tan(_theta)*sec(_theta)**2 - tan(_theta), substep=AddRule(substeps=[AlternativeRule(alternatives=[URule(u_var=_u, u_func=sec(_theta), constant=1, substep=PowerRule(base=_u, exp=1, context=_u, symbol=_u), context=tan(_theta)*sec(_theta)**2, symbol=_theta), URule(u_var=_u, u_func=tan(_theta), constant=1, substep=PowerRule(base=_u, exp=1, context=_u, symbol=_u), context=tan(_theta)*sec(_theta)**2, symbol=_theta)], context=tan(_theta)*sec(_theta)**2, symbol=_theta), ConstantTimesRule(constant=-1, other=tan(_theta), substep=RewriteRule(rewritten=sin(_theta)/cos(_theta), substep=URule(u_var=_u, u_func=cos(_theta), constant=-1, substep=ConstantTimesRule(constant=-1, other=1/_u, substep=ReciprocalRule(func=_u, context=1/_u, symbol=_u), context=1/_u, symbol=_u), context=sin(_theta)/cos(_theta), symbol=_theta), context=tan(_theta), symbol=_theta), context=-tan(_theta), symbol=_theta)], context=tan(_theta)*sec(_theta)**2 - tan(_theta), symbol=_theta), context=(sec(_theta)**2 - 1)*tan(_theta), symbol=_theta)], context=(sec(_theta)**2 - 1)*tan(_theta), symbol=_theta), context=tan(_theta)**3, symbol=_theta), context=tan(_theta)**3/2, symbol=_theta), restriction=True, context=x**3/((sqrt(2*x))**4 + 8), symbol=x)
Añadimos la constante de integración:
Respuesta:
/ / 2\ | | x | | 3 log|1 + --| 2 | x 1 \ 2 / x | ------------ dx = - + C - ----------- + -- | 4 4 4 8 | _____ | \/ 2*x + 8 | /
Estos ejemplos se pueden aplicar para introducción de los límites de integración inferior y superior.