1 / | | 1 | ----------- dx | 5/2 | / 2\ | \4 + x / | / 0
Integral(1/((4 + x^2)^(5/2)), (x, 0, 1))
Hay varias maneras de calcular esta integral.
Vuelva a escribir el integrando:
TrigSubstitutionRule(theta=_theta, func=2*tan(_theta), rewritten=cos(_theta)**3/16, substep=ConstantTimesRule(constant=1/16, other=cos(_theta)**3, substep=RewriteRule(rewritten=(1 - sin(_theta)**2)*cos(_theta), substep=AlternativeRule(alternatives=[URule(u_var=_u, u_func=sin(_theta), constant=1, substep=AddRule(substeps=[ConstantRule(constant=1, context=1, symbol=_u), ConstantTimesRule(constant=-1, other=_u**2, substep=PowerRule(base=_u, exp=2, context=_u**2, symbol=_u), context=-_u**2, symbol=_u)], context=1 - _u**2, symbol=_u), context=(1 - sin(_theta)**2)*cos(_theta), symbol=_theta), RewriteRule(rewritten=-sin(_theta)**2*cos(_theta) + cos(_theta), substep=AddRule(substeps=[ConstantTimesRule(constant=-1, other=sin(_theta)**2*cos(_theta), substep=URule(u_var=_u, u_func=sin(_theta), constant=1, substep=PowerRule(base=_u, exp=2, context=_u**2, symbol=_u), context=sin(_theta)**2*cos(_theta), symbol=_theta), context=-sin(_theta)**2*cos(_theta), symbol=_theta), TrigRule(func='cos', arg=_theta, context=cos(_theta), symbol=_theta)], context=-sin(_theta)**2*cos(_theta) + cos(_theta), symbol=_theta), context=(1 - sin(_theta)**2)*cos(_theta), symbol=_theta), RewriteRule(rewritten=-sin(_theta)**2*cos(_theta) + cos(_theta), substep=AddRule(substeps=[ConstantTimesRule(constant=-1, other=sin(_theta)**2*cos(_theta), substep=URule(u_var=_u, u_func=sin(_theta), constant=1, substep=PowerRule(base=_u, exp=2, context=_u**2, symbol=_u), context=sin(_theta)**2*cos(_theta), symbol=_theta), context=-sin(_theta)**2*cos(_theta), symbol=_theta), TrigRule(func='cos', arg=_theta, context=cos(_theta), symbol=_theta)], context=-sin(_theta)**2*cos(_theta) + cos(_theta), symbol=_theta), context=(1 - sin(_theta)**2)*cos(_theta), symbol=_theta)], context=(1 - sin(_theta)**2)*cos(_theta), symbol=_theta), context=cos(_theta)**3, symbol=_theta), context=cos(_theta)**3/16, symbol=_theta), restriction=True, context=1/(x**4*sqrt(x**2 + 4) + 8*x**2*sqrt(x**2 + 4) + 16*sqrt(x**2 + 4)), symbol=x)
Vuelva a escribir el integrando:
TrigSubstitutionRule(theta=_theta, func=2*tan(_theta), rewritten=cos(_theta)**3/16, substep=ConstantTimesRule(constant=1/16, other=cos(_theta)**3, substep=RewriteRule(rewritten=(1 - sin(_theta)**2)*cos(_theta), substep=AlternativeRule(alternatives=[URule(u_var=_u, u_func=sin(_theta), constant=1, substep=AddRule(substeps=[ConstantRule(constant=1, context=1, symbol=_u), ConstantTimesRule(constant=-1, other=_u**2, substep=PowerRule(base=_u, exp=2, context=_u**2, symbol=_u), context=-_u**2, symbol=_u)], context=1 - _u**2, symbol=_u), context=(1 - sin(_theta)**2)*cos(_theta), symbol=_theta), RewriteRule(rewritten=-sin(_theta)**2*cos(_theta) + cos(_theta), substep=AddRule(substeps=[ConstantTimesRule(constant=-1, other=sin(_theta)**2*cos(_theta), substep=URule(u_var=_u, u_func=sin(_theta), constant=1, substep=PowerRule(base=_u, exp=2, context=_u**2, symbol=_u), context=sin(_theta)**2*cos(_theta), symbol=_theta), context=-sin(_theta)**2*cos(_theta), symbol=_theta), TrigRule(func='cos', arg=_theta, context=cos(_theta), symbol=_theta)], context=-sin(_theta)**2*cos(_theta) + cos(_theta), symbol=_theta), context=(1 - sin(_theta)**2)*cos(_theta), symbol=_theta), RewriteRule(rewritten=-sin(_theta)**2*cos(_theta) + cos(_theta), substep=AddRule(substeps=[ConstantTimesRule(constant=-1, other=sin(_theta)**2*cos(_theta), substep=URule(u_var=_u, u_func=sin(_theta), constant=1, substep=PowerRule(base=_u, exp=2, context=_u**2, symbol=_u), context=sin(_theta)**2*cos(_theta), symbol=_theta), context=-sin(_theta)**2*cos(_theta), symbol=_theta), TrigRule(func='cos', arg=_theta, context=cos(_theta), symbol=_theta)], context=-sin(_theta)**2*cos(_theta) + cos(_theta), symbol=_theta), context=(1 - sin(_theta)**2)*cos(_theta), symbol=_theta)], context=(1 - sin(_theta)**2)*cos(_theta), symbol=_theta), context=cos(_theta)**3, symbol=_theta), context=cos(_theta)**3/16, symbol=_theta), restriction=True, context=1/(x**4*sqrt(x**2 + 4) + 8*x**2*sqrt(x**2 + 4) + 16*sqrt(x**2 + 4)), symbol=x)
Ahora simplificar:
Añadimos la constante de integración:
Respuesta:
/ | 3 | 1 x x | ----------- dx = C - -------------- + -------------- | 5/2 3/2 ________ | / 2\ / 2\ / 2 | \4 + x / 48*\4 + x / 16*\/ 4 + x | /
___ 7*\/ 5 ------- 600
=
___ 7*\/ 5 ------- 600
7*sqrt(5)/600
Estos ejemplos se pueden aplicar para introducción de los límites de integración inferior y superior.