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