3.617 \(\int \frac {a+b x^4}{x^8} \, dx\)

Optimal. Leaf size=17 \[ -\frac {a}{7 x^7}-\frac {b}{3 x^3} \]

[Out]

-1/7*a/x^7-1/3*b/x^3

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Rubi [A]  time = 0.00, antiderivative size = 17, normalized size of antiderivative = 1.00, 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} \[ -\frac {a}{7 x^7}-\frac {b}{3 x^3} \]

Antiderivative was successfully verified.

[In]

Int[(a + b*x^4)/x^8,x]

[Out]

-a/(7*x^7) - b/(3*x^3)

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

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Mathematica [A]  time = 0.00, size = 17, normalized size = 1.00 \[ -\frac {a}{7 x^7}-\frac {b}{3 x^3} \]

Antiderivative was successfully verified.

[In]

Integrate[(a + b*x^4)/x^8,x]

[Out]

-1/7*a/x^7 - b/(3*x^3)

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fricas [A]  time = 0.65, size = 15, normalized size = 0.88 \[ -\frac {7 \, b x^{4} + 3 \, a}{21 \, x^{7}} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((b*x^4+a)/x^8,x, algorithm="fricas")

[Out]

-1/21*(7*b*x^4 + 3*a)/x^7

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giac [A]  time = 0.15, size = 15, normalized size = 0.88 \[ -\frac {7 \, b x^{4} + 3 \, a}{21 \, x^{7}} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((b*x^4+a)/x^8,x, algorithm="giac")

[Out]

-1/21*(7*b*x^4 + 3*a)/x^7

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maple [A]  time = 0.00, size = 14, normalized size = 0.82 \[ -\frac {b}{3 x^{3}}-\frac {a}{7 x^{7}} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int((b*x^4+a)/x^8,x)

[Out]

-1/7*a/x^7-1/3*b/x^3

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maxima [A]  time = 1.34, size = 15, normalized size = 0.88 \[ -\frac {7 \, b x^{4} + 3 \, a}{21 \, x^{7}} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((b*x^4+a)/x^8,x, algorithm="maxima")

[Out]

-1/21*(7*b*x^4 + 3*a)/x^7

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mupad [B]  time = 0.03, size = 15, normalized size = 0.88 \[ -\frac {7\,b\,x^4+3\,a}{21\,x^7} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int((a + b*x^4)/x^8,x)

[Out]

-(3*a + 7*b*x^4)/(21*x^7)

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sympy [A]  time = 0.32, size = 15, normalized size = 0.88 \[ \frac {- 3 a - 7 b x^{4}}{21 x^{7}} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((b*x**4+a)/x**8,x)

[Out]

(-3*a - 7*b*x**4)/(21*x**7)

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