3.217 \(\int \frac{a+b x^3}{x^8} \, dx\)

Optimal. Leaf size=17 \[ -\frac{a}{7 x^7}-\frac{b}{4 x^4} \]

[Out]

-a/(7*x^7) - b/(4*x^4)

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Rubi [A]  time = 0.0045915, antiderivative size = 17, normalized size of antiderivative = 1., number of steps used = 2, number of rules used = 1, integrand size = 11, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.091, Rules used = {14} \[ -\frac{a}{7 x^7}-\frac{b}{4 x^4} \]

Antiderivative was successfully verified.

[In]

Int[(a + b*x^3)/x^8,x]

[Out]

-a/(7*x^7) - b/(4*x^4)

Rule 14

Int[(u_)*((c_.)*(x_))^(m_.), x_Symbol] :> Int[ExpandIntegrand[(c*x)^m*u, x], x] /; FreeQ[{c, m}, x] && SumQ[u]
&&  !LinearQ[u, x] &&  !MatchQ[u, (a_) + (b_.)*(v_) /; FreeQ[{a, b}, x] && InverseFunctionQ[v]]

Rubi steps

\begin{align*} \int \frac{a+b x^3}{x^8} \, dx &=\int \left (\frac{a}{x^8}+\frac{b}{x^5}\right ) \, dx\\ &=-\frac{a}{7 x^7}-\frac{b}{4 x^4}\\ \end{align*}

Mathematica [A]  time = 0.0019117, size = 17, normalized size = 1. \[ -\frac{a}{7 x^7}-\frac{b}{4 x^4} \]

Antiderivative was successfully verified.

[In]

Integrate[(a + b*x^3)/x^8,x]

[Out]

-a/(7*x^7) - b/(4*x^4)

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Maple [A]  time = 0.003, size = 14, normalized size = 0.8 \begin{align*} -{\frac{a}{7\,{x}^{7}}}-{\frac{b}{4\,{x}^{4}}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int((b*x^3+a)/x^8,x)

[Out]

-1/7*a/x^7-1/4*b/x^4

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Maxima [A]  time = 0.949518, size = 20, normalized size = 1.18 \begin{align*} -\frac{7 \, b x^{3} + 4 \, a}{28 \, x^{7}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((b*x^3+a)/x^8,x, algorithm="maxima")

[Out]

-1/28*(7*b*x^3 + 4*a)/x^7

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Fricas [A]  time = 1.56388, size = 36, normalized size = 2.12 \begin{align*} -\frac{7 \, b x^{3} + 4 \, a}{28 \, x^{7}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((b*x^3+a)/x^8,x, algorithm="fricas")

[Out]

-1/28*(7*b*x^3 + 4*a)/x^7

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Sympy [A]  time = 0.412026, size = 15, normalized size = 0.88 \begin{align*} - \frac{4 a + 7 b x^{3}}{28 x^{7}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((b*x**3+a)/x**8,x)

[Out]

-(4*a + 7*b*x**3)/(28*x**7)

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Giac [A]  time = 1.10053, size = 20, normalized size = 1.18 \begin{align*} -\frac{7 \, b x^{3} + 4 \, a}{28 \, x^{7}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((b*x^3+a)/x^8,x, algorithm="giac")

[Out]

-1/28*(7*b*x^3 + 4*a)/x^7