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