3.10 \(\int \frac{(a+b x^3) (A+B x^3)}{x^7} \, dx\)

Optimal. Leaf size=29 \[ -\frac{a B+A b}{3 x^3}-\frac{a A}{6 x^6}+b B \log (x) \]

[Out]

-(a*A)/(6*x^6) - (A*b + a*B)/(3*x^3) + b*B*Log[x]

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Rubi [A]  time = 0.0211706, antiderivative size = 29, normalized size of antiderivative = 1., number of steps used = 3, number of rules used = 2, integrand size = 18, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.111, Rules used = {446, 76} \[ -\frac{a B+A b}{3 x^3}-\frac{a A}{6 x^6}+b B \log (x) \]

Antiderivative was successfully verified.

[In]

Int[((a + b*x^3)*(A + B*x^3))/x^7,x]

[Out]

-(a*A)/(6*x^6) - (A*b + a*B)/(3*x^3) + b*B*Log[x]

Rule 446

Int[(x_)^(m_.)*((a_) + (b_.)*(x_)^(n_))^(p_.)*((c_) + (d_.)*(x_)^(n_))^(q_.), x_Symbol] :> Dist[1/n, Subst[Int
[x^(Simplify[(m + 1)/n] - 1)*(a + b*x)^p*(c + d*x)^q, x], x, x^n], x] /; FreeQ[{a, b, c, d, m, n, p, q}, x] &&
NeQ[b*c - a*d, 0] && IntegerQ[Simplify[(m + 1)/n]]

Rule 76

Int[((d_.)*(x_))^(n_.)*((a_) + (b_.)*(x_))*((e_) + (f_.)*(x_))^(p_.), x_Symbol] :> Int[ExpandIntegrand[(a + b*
x)*(d*x)^n*(e + f*x)^p, x], x] /; FreeQ[{a, b, d, e, f, n}, x] && IGtQ[p, 0] && (NeQ[n, -1] || EqQ[p, 1]) && N
eQ[b*e + a*f, 0] && ( !IntegerQ[n] || LtQ[9*p + 5*n, 0] || GeQ[n + p + 1, 0] || (GeQ[n + p + 2, 0] && Rational
Q[a, b, d, e, f])) && (NeQ[n + p + 3, 0] || EqQ[p, 1])

Rubi steps

\begin{align*} \int \frac{\left (a+b x^3\right ) \left (A+B x^3\right )}{x^7} \, dx &=\frac{1}{3} \operatorname{Subst}\left (\int \frac{(a+b x) (A+B x)}{x^3} \, dx,x,x^3\right )\\ &=\frac{1}{3} \operatorname{Subst}\left (\int \left (\frac{a A}{x^3}+\frac{A b+a B}{x^2}+\frac{b B}{x}\right ) \, dx,x,x^3\right )\\ &=-\frac{a A}{6 x^6}-\frac{A b+a B}{3 x^3}+b B \log (x)\\ \end{align*}

Mathematica [A]  time = 0.016098, size = 31, normalized size = 1.07 \[ \frac{-a B-A b}{3 x^3}-\frac{a A}{6 x^6}+b B \log (x) \]

Antiderivative was successfully verified.

[In]

Integrate[((a + b*x^3)*(A + B*x^3))/x^7,x]

[Out]

-(a*A)/(6*x^6) + (-(A*b) - a*B)/(3*x^3) + b*B*Log[x]

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Maple [A]  time = 0.006, size = 28, normalized size = 1. \begin{align*} -{\frac{Ab}{3\,{x}^{3}}}-{\frac{Ba}{3\,{x}^{3}}}-{\frac{Aa}{6\,{x}^{6}}}+bB\ln \left ( x \right ) \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int((b*x^3+a)*(B*x^3+A)/x^7,x)

[Out]

-1/3/x^3*A*b-1/3/x^3*B*a-1/6*a*A/x^6+b*B*ln(x)

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Maxima [A]  time = 1.33586, size = 41, normalized size = 1.41 \begin{align*} \frac{1}{3} \, B b \log \left (x^{3}\right ) - \frac{2 \,{\left (B a + A b\right )} x^{3} + A a}{6 \, x^{6}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((b*x^3+a)*(B*x^3+A)/x^7,x, algorithm="maxima")

[Out]

1/3*B*b*log(x^3) - 1/6*(2*(B*a + A*b)*x^3 + A*a)/x^6

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Fricas [A]  time = 1.47408, size = 73, normalized size = 2.52 \begin{align*} \frac{6 \, B b x^{6} \log \left (x\right ) - 2 \,{\left (B a + A b\right )} x^{3} - A a}{6 \, x^{6}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((b*x^3+a)*(B*x^3+A)/x^7,x, algorithm="fricas")

[Out]

1/6*(6*B*b*x^6*log(x) - 2*(B*a + A*b)*x^3 - A*a)/x^6

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Sympy [A]  time = 0.65047, size = 27, normalized size = 0.93 \begin{align*} B b \log{\left (x \right )} - \frac{A a + x^{3} \left (2 A b + 2 B a\right )}{6 x^{6}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((b*x**3+a)*(B*x**3+A)/x**7,x)

[Out]

B*b*log(x) - (A*a + x**3*(2*A*b + 2*B*a))/(6*x**6)

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Giac [A]  time = 1.19674, size = 50, normalized size = 1.72 \begin{align*} B b \log \left ({\left | x \right |}\right ) - \frac{3 \, B b x^{6} + 2 \, B a x^{3} + 2 \, A b x^{3} + A a}{6 \, x^{6}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((b*x^3+a)*(B*x^3+A)/x^7,x, algorithm="giac")

[Out]

B*b*log(abs(x)) - 1/6*(3*B*b*x^6 + 2*B*a*x^3 + 2*A*b*x^3 + A*a)/x^6