Integrand size = 32, antiderivative size = 88 \[ \int \frac {x^{-1+2 n}}{\left (a^2+2 a b x^n+b^2 x^{2 n}\right )^{7/2}} \, dx=\frac {a}{6 b^2 n \left (a+b x^n\right )^5 \sqrt {a^2+2 a b x^n+b^2 x^{2 n}}}-\frac {1}{5 b^2 n \left (a+b x^n\right )^4 \sqrt {a^2+2 a b x^n+b^2 x^{2 n}}} \]
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Time = 0.03 (sec) , antiderivative size = 88, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.094, Rules used = {1369, 272, 45} \[ \int \frac {x^{-1+2 n}}{\left (a^2+2 a b x^n+b^2 x^{2 n}\right )^{7/2}} \, dx=\frac {a}{6 b^2 n \left (a+b x^n\right )^5 \sqrt {a^2+2 a b x^n+b^2 x^{2 n}}}-\frac {1}{5 b^2 n \left (a+b x^n\right )^4 \sqrt {a^2+2 a b x^n+b^2 x^{2 n}}} \]
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Rule 45
Rule 272
Rule 1369
Rubi steps \begin{align*} \text {integral}& = \frac {\left (b^6 \left (a b+b^2 x^n\right )\right ) \int \frac {x^{-1+2 n}}{\left (a b+b^2 x^n\right )^7} \, dx}{\sqrt {a^2+2 a b x^n+b^2 x^{2 n}}} \\ & = \frac {\left (b^6 \left (a b+b^2 x^n\right )\right ) \text {Subst}\left (\int \frac {x}{\left (a b+b^2 x\right )^7} \, dx,x,x^n\right )}{n \sqrt {a^2+2 a b x^n+b^2 x^{2 n}}} \\ & = \frac {\left (b^6 \left (a b+b^2 x^n\right )\right ) \text {Subst}\left (\int \left (-\frac {a}{b^8 (a+b x)^7}+\frac {1}{b^8 (a+b x)^6}\right ) \, dx,x,x^n\right )}{n \sqrt {a^2+2 a b x^n+b^2 x^{2 n}}} \\ & = \frac {a}{6 b^2 n \left (a+b x^n\right )^5 \sqrt {a^2+2 a b x^n+b^2 x^{2 n}}}-\frac {1}{5 b^2 n \left (a+b x^n\right )^4 \sqrt {a^2+2 a b x^n+b^2 x^{2 n}}} \\ \end{align*}
Time = 0.06 (sec) , antiderivative size = 40, normalized size of antiderivative = 0.45 \[ \int \frac {x^{-1+2 n}}{\left (a^2+2 a b x^n+b^2 x^{2 n}\right )^{7/2}} \, dx=\frac {\left (-a-6 b x^n\right ) \left (a+b x^n\right )}{30 b^2 n \left (\left (a+b x^n\right )^2\right )^{7/2}} \]
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Time = 0.05 (sec) , antiderivative size = 37, normalized size of antiderivative = 0.42
method | result | size |
risch | \(-\frac {\sqrt {\left (a +b \,x^{n}\right )^{2}}\, \left (6 b \,x^{n}+a \right )}{30 \left (a +b \,x^{n}\right )^{7} b^{2} n}\) | \(37\) |
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Time = 0.25 (sec) , antiderivative size = 97, normalized size of antiderivative = 1.10 \[ \int \frac {x^{-1+2 n}}{\left (a^2+2 a b x^n+b^2 x^{2 n}\right )^{7/2}} \, dx=-\frac {6 \, b x^{n} + a}{30 \, {\left (b^{8} n x^{6 \, n} + 6 \, a b^{7} n x^{5 \, n} + 15 \, a^{2} b^{6} n x^{4 \, n} + 20 \, a^{3} b^{5} n x^{3 \, n} + 15 \, a^{4} b^{4} n x^{2 \, n} + 6 \, a^{5} b^{3} n x^{n} + a^{6} b^{2} n\right )}} \]
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Timed out. \[ \int \frac {x^{-1+2 n}}{\left (a^2+2 a b x^n+b^2 x^{2 n}\right )^{7/2}} \, dx=\text {Timed out} \]
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Time = 0.18 (sec) , antiderivative size = 97, normalized size of antiderivative = 1.10 \[ \int \frac {x^{-1+2 n}}{\left (a^2+2 a b x^n+b^2 x^{2 n}\right )^{7/2}} \, dx=-\frac {6 \, b x^{n} + a}{30 \, {\left (b^{8} n x^{6 \, n} + 6 \, a b^{7} n x^{5 \, n} + 15 \, a^{2} b^{6} n x^{4 \, n} + 20 \, a^{3} b^{5} n x^{3 \, n} + 15 \, a^{4} b^{4} n x^{2 \, n} + 6 \, a^{5} b^{3} n x^{n} + a^{6} b^{2} n\right )}} \]
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\[ \int \frac {x^{-1+2 n}}{\left (a^2+2 a b x^n+b^2 x^{2 n}\right )^{7/2}} \, dx=\int { \frac {x^{2 \, n - 1}}{{\left (b^{2} x^{2 \, n} + 2 \, a b x^{n} + a^{2}\right )}^{\frac {7}{2}}} \,d x } \]
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Timed out. \[ \int \frac {x^{-1+2 n}}{\left (a^2+2 a b x^n+b^2 x^{2 n}\right )^{7/2}} \, dx=\int \frac {x^{2\,n-1}}{{\left (a^2+b^2\,x^{2\,n}+2\,a\,b\,x^n\right )}^{7/2}} \,d x \]
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