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

Optimal. Leaf size=84 \[ -\frac {a^7}{2 x^2}-\frac {7 a^6 b}{x}+21 a^5 b^2 \log (x)+35 a^4 b^3 x+\frac {35}{2} a^3 b^4 x^2+7 a^2 b^5 x^3+\frac {7}{4} a b^6 x^4+\frac {b^7 x^5}{5} \]

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Rubi [A]  time = 0.03, antiderivative size = 84, 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 = {43} \begin {gather*} \frac {35}{2} a^3 b^4 x^2+7 a^2 b^5 x^3+35 a^4 b^3 x+21 a^5 b^2 \log (x)-\frac {7 a^6 b}{x}-\frac {a^7}{2 x^2}+\frac {7}{4} a b^6 x^4+\frac {b^7 x^5}{5} \end {gather*}

Antiderivative was successfully verified.

[In]

Int[(a + b*x)^7/x^3,x]

[Out]

-a^7/(2*x^2) - (7*a^6*b)/x + 35*a^4*b^3*x + (35*a^3*b^4*x^2)/2 + 7*a^2*b^5*x^3 + (7*a*b^6*x^4)/4 + (b^7*x^5)/5
+ 21*a^5*b^2*Log[x]

Rule 43

Int[((a_.) + (b_.)*(x_))^(m_.)*((c_.) + (d_.)*(x_))^(n_.), x_Symbol] :> Int[ExpandIntegrand[(a + b*x)^m*(c + d
*x)^n, x], x] /; FreeQ[{a, b, c, d, n}, x] && NeQ[b*c - a*d, 0] && IGtQ[m, 0] && ( !IntegerQ[n] || (EqQ[c, 0]
&& LeQ[7*m + 4*n + 4, 0]) || LtQ[9*m + 5*(n + 1), 0] || GtQ[m + n + 2, 0])

Rubi steps

\begin {align*} \int \frac {(a+b x)^7}{x^3} \, dx &=\int \left (35 a^4 b^3+\frac {a^7}{x^3}+\frac {7 a^6 b}{x^2}+\frac {21 a^5 b^2}{x}+35 a^3 b^4 x+21 a^2 b^5 x^2+7 a b^6 x^3+b^7 x^4\right ) \, dx\\ &=-\frac {a^7}{2 x^2}-\frac {7 a^6 b}{x}+35 a^4 b^3 x+\frac {35}{2} a^3 b^4 x^2+7 a^2 b^5 x^3+\frac {7}{4} a b^6 x^4+\frac {b^7 x^5}{5}+21 a^5 b^2 \log (x)\\ \end {align*}

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Mathematica [A]  time = 0.00, size = 84, normalized size = 1.00 \begin {gather*} -\frac {a^7}{2 x^2}-\frac {7 a^6 b}{x}+21 a^5 b^2 \log (x)+35 a^4 b^3 x+\frac {35}{2} a^3 b^4 x^2+7 a^2 b^5 x^3+\frac {7}{4} a b^6 x^4+\frac {b^7 x^5}{5} \end {gather*}

Antiderivative was successfully verified.

[In]

Integrate[(a + b*x)^7/x^3,x]

[Out]

-1/2*a^7/x^2 - (7*a^6*b)/x + 35*a^4*b^3*x + (35*a^3*b^4*x^2)/2 + 7*a^2*b^5*x^3 + (7*a*b^6*x^4)/4 + (b^7*x^5)/5
+ 21*a^5*b^2*Log[x]

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IntegrateAlgebraic [F]  time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \int \frac {(a+b x)^7}{x^3} \, dx \end {gather*}

Verification is not applicable to the result.

[In]

IntegrateAlgebraic[(a + b*x)^7/x^3,x]

[Out]

IntegrateAlgebraic[(a + b*x)^7/x^3, x]

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fricas [A]  time = 1.62, size = 81, normalized size = 0.96 \begin {gather*} \frac {4 \, b^{7} x^{7} + 35 \, a b^{6} x^{6} + 140 \, a^{2} b^{5} x^{5} + 350 \, a^{3} b^{4} x^{4} + 700 \, a^{4} b^{3} x^{3} + 420 \, a^{5} b^{2} x^{2} \log \relax (x) - 140 \, a^{6} b x - 10 \, a^{7}}{20 \, x^{2}} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

1/20*(4*b^7*x^7 + 35*a*b^6*x^6 + 140*a^2*b^5*x^5 + 350*a^3*b^4*x^4 + 700*a^4*b^3*x^3 + 420*a^5*b^2*x^2*log(x)
- 140*a^6*b*x - 10*a^7)/x^2

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giac [A]  time = 1.06, size = 76, normalized size = 0.90 \begin {gather*} \frac {1}{5} \, b^{7} x^{5} + \frac {7}{4} \, a b^{6} x^{4} + 7 \, a^{2} b^{5} x^{3} + \frac {35}{2} \, a^{3} b^{4} x^{2} + 35 \, a^{4} b^{3} x + 21 \, a^{5} b^{2} \log \left ({\left | x \right |}\right ) - \frac {14 \, a^{6} b x + a^{7}}{2 \, x^{2}} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

1/5*b^7*x^5 + 7/4*a*b^6*x^4 + 7*a^2*b^5*x^3 + 35/2*a^3*b^4*x^2 + 35*a^4*b^3*x + 21*a^5*b^2*log(abs(x)) - 1/2*(
14*a^6*b*x + a^7)/x^2

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maple [A]  time = 0.01, size = 77, normalized size = 0.92 \begin {gather*} \frac {b^{7} x^{5}}{5}+\frac {7 a \,b^{6} x^{4}}{4}+7 a^{2} b^{5} x^{3}+\frac {35 a^{3} b^{4} x^{2}}{2}+21 a^{5} b^{2} \ln \relax (x )+35 a^{4} b^{3} x -\frac {7 a^{6} b}{x}-\frac {a^{7}}{2 x^{2}} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

-1/2*a^7/x^2-7*a^6*b/x+35*a^4*b^3*x+35/2*a^3*b^4*x^2+7*a^2*b^5*x^3+7/4*a*b^6*x^4+1/5*b^7*x^5+21*a^5*b^2*ln(x)

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maxima [A]  time = 1.38, size = 75, normalized size = 0.89 \begin {gather*} \frac {1}{5} \, b^{7} x^{5} + \frac {7}{4} \, a b^{6} x^{4} + 7 \, a^{2} b^{5} x^{3} + \frac {35}{2} \, a^{3} b^{4} x^{2} + 35 \, a^{4} b^{3} x + 21 \, a^{5} b^{2} \log \relax (x) - \frac {14 \, a^{6} b x + a^{7}}{2 \, x^{2}} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

1/5*b^7*x^5 + 7/4*a*b^6*x^4 + 7*a^2*b^5*x^3 + 35/2*a^3*b^4*x^2 + 35*a^4*b^3*x + 21*a^5*b^2*log(x) - 1/2*(14*a^
6*b*x + a^7)/x^2

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mupad [B]  time = 0.05, size = 77, normalized size = 0.92 \begin {gather*} \frac {b^7\,x^5}{5}-\frac {\frac {a^7}{2}+7\,b\,x\,a^6}{x^2}+35\,a^4\,b^3\,x+\frac {7\,a\,b^6\,x^4}{4}+\frac {35\,a^3\,b^4\,x^2}{2}+7\,a^2\,b^5\,x^3+21\,a^5\,b^2\,\ln \relax (x) \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int((a + b*x)^7/x^3,x)

[Out]

(b^7*x^5)/5 - (a^7/2 + 7*a^6*b*x)/x^2 + 35*a^4*b^3*x + (7*a*b^6*x^4)/4 + (35*a^3*b^4*x^2)/2 + 7*a^2*b^5*x^3 +
21*a^5*b^2*log(x)

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sympy [A]  time = 0.25, size = 85, normalized size = 1.01 \begin {gather*} 21 a^{5} b^{2} \log {\relax (x )} + 35 a^{4} b^{3} x + \frac {35 a^{3} b^{4} x^{2}}{2} + 7 a^{2} b^{5} x^{3} + \frac {7 a b^{6} x^{4}}{4} + \frac {b^{7} x^{5}}{5} + \frac {- a^{7} - 14 a^{6} b x}{2 x^{2}} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

21*a**5*b**2*log(x) + 35*a**4*b**3*x + 35*a**3*b**4*x**2/2 + 7*a**2*b**5*x**3 + 7*a*b**6*x**4/4 + b**7*x**5/5
+ (-a**7 - 14*a**6*b*x)/(2*x**2)

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