Integrand size = 13, antiderivative size = 96 \[ \int \frac {\left (a+\frac {b}{x}\right )^8}{x^6} \, dx=-\frac {(b+a x)^9}{13 b x^{13}}+\frac {a (b+a x)^9}{39 b^2 x^{12}}-\frac {a^2 (b+a x)^9}{143 b^3 x^{11}}+\frac {a^3 (b+a x)^9}{715 b^4 x^{10}}-\frac {a^4 (b+a x)^9}{6435 b^5 x^9} \]
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Time = 0.02 (sec) , antiderivative size = 96, normalized size of antiderivative = 1.00, number of steps used = 6, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.231, Rules used = {269, 47, 37} \[ \int \frac {\left (a+\frac {b}{x}\right )^8}{x^6} \, dx=-\frac {a^4 (a x+b)^9}{6435 b^5 x^9}+\frac {a^3 (a x+b)^9}{715 b^4 x^{10}}-\frac {a^2 (a x+b)^9}{143 b^3 x^{11}}+\frac {a (a x+b)^9}{39 b^2 x^{12}}-\frac {(a x+b)^9}{13 b x^{13}} \]
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Rule 37
Rule 47
Rule 269
Rubi steps \begin{align*} \text {integral}& = \int \frac {(b+a x)^8}{x^{14}} \, dx \\ & = -\frac {(b+a x)^9}{13 b x^{13}}-\frac {(4 a) \int \frac {(b+a x)^8}{x^{13}} \, dx}{13 b} \\ & = -\frac {(b+a x)^9}{13 b x^{13}}+\frac {a (b+a x)^9}{39 b^2 x^{12}}+\frac {a^2 \int \frac {(b+a x)^8}{x^{12}} \, dx}{13 b^2} \\ & = -\frac {(b+a x)^9}{13 b x^{13}}+\frac {a (b+a x)^9}{39 b^2 x^{12}}-\frac {a^2 (b+a x)^9}{143 b^3 x^{11}}-\frac {\left (2 a^3\right ) \int \frac {(b+a x)^8}{x^{11}} \, dx}{143 b^3} \\ & = -\frac {(b+a x)^9}{13 b x^{13}}+\frac {a (b+a x)^9}{39 b^2 x^{12}}-\frac {a^2 (b+a x)^9}{143 b^3 x^{11}}+\frac {a^3 (b+a x)^9}{715 b^4 x^{10}}+\frac {a^4 \int \frac {(b+a x)^8}{x^{10}} \, dx}{715 b^4} \\ & = -\frac {(b+a x)^9}{13 b x^{13}}+\frac {a (b+a x)^9}{39 b^2 x^{12}}-\frac {a^2 (b+a x)^9}{143 b^3 x^{11}}+\frac {a^3 (b+a x)^9}{715 b^4 x^{10}}-\frac {a^4 (b+a x)^9}{6435 b^5 x^9} \\ \end{align*}
Time = 0.02 (sec) , antiderivative size = 104, normalized size of antiderivative = 1.08 \[ \int \frac {\left (a+\frac {b}{x}\right )^8}{x^6} \, dx=-\frac {b^8}{13 x^{13}}-\frac {2 a b^7}{3 x^{12}}-\frac {28 a^2 b^6}{11 x^{11}}-\frac {28 a^3 b^5}{5 x^{10}}-\frac {70 a^4 b^4}{9 x^9}-\frac {7 a^5 b^3}{x^8}-\frac {4 a^6 b^2}{x^7}-\frac {4 a^7 b}{3 x^6}-\frac {a^8}{5 x^5} \]
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Time = 0.02 (sec) , antiderivative size = 90, normalized size of antiderivative = 0.94
method | result | size |
norman | \(\frac {-\frac {1}{5} a^{8} x^{8}-\frac {4}{3} x^{7} b \,a^{7}-4 a^{6} b^{2} x^{6}-7 a^{5} b^{3} x^{5}-\frac {70}{9} a^{4} x^{4} b^{4}-\frac {28}{5} a^{3} b^{5} x^{3}-\frac {28}{11} a^{2} b^{6} x^{2}-\frac {2}{3} a \,b^{7} x -\frac {1}{13} b^{8}}{x^{13}}\) | \(90\) |
risch | \(\frac {-\frac {1}{5} a^{8} x^{8}-\frac {4}{3} x^{7} b \,a^{7}-4 a^{6} b^{2} x^{6}-7 a^{5} b^{3} x^{5}-\frac {70}{9} a^{4} x^{4} b^{4}-\frac {28}{5} a^{3} b^{5} x^{3}-\frac {28}{11} a^{2} b^{6} x^{2}-\frac {2}{3} a \,b^{7} x -\frac {1}{13} b^{8}}{x^{13}}\) | \(90\) |
gosper | \(-\frac {1287 a^{8} x^{8}+8580 x^{7} b \,a^{7}+25740 a^{6} b^{2} x^{6}+45045 a^{5} b^{3} x^{5}+50050 a^{4} x^{4} b^{4}+36036 a^{3} b^{5} x^{3}+16380 a^{2} b^{6} x^{2}+4290 a \,b^{7} x +495 b^{8}}{6435 x^{13}}\) | \(91\) |
default | \(-\frac {4 a^{7} b}{3 x^{6}}-\frac {2 a \,b^{7}}{3 x^{12}}-\frac {4 a^{6} b^{2}}{x^{7}}-\frac {7 a^{5} b^{3}}{x^{8}}-\frac {28 a^{3} b^{5}}{5 x^{10}}-\frac {28 a^{2} b^{6}}{11 x^{11}}-\frac {b^{8}}{13 x^{13}}-\frac {a^{8}}{5 x^{5}}-\frac {70 a^{4} b^{4}}{9 x^{9}}\) | \(91\) |
parallelrisch | \(\frac {-1287 a^{8} x^{8}-8580 x^{7} b \,a^{7}-25740 a^{6} b^{2} x^{6}-45045 a^{5} b^{3} x^{5}-50050 a^{4} x^{4} b^{4}-36036 a^{3} b^{5} x^{3}-16380 a^{2} b^{6} x^{2}-4290 a \,b^{7} x -495 b^{8}}{6435 x^{13}}\) | \(91\) |
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Time = 0.29 (sec) , antiderivative size = 90, normalized size of antiderivative = 0.94 \[ \int \frac {\left (a+\frac {b}{x}\right )^8}{x^6} \, dx=-\frac {1287 \, a^{8} x^{8} + 8580 \, a^{7} b x^{7} + 25740 \, a^{6} b^{2} x^{6} + 45045 \, a^{5} b^{3} x^{5} + 50050 \, a^{4} b^{4} x^{4} + 36036 \, a^{3} b^{5} x^{3} + 16380 \, a^{2} b^{6} x^{2} + 4290 \, a b^{7} x + 495 \, b^{8}}{6435 \, x^{13}} \]
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Time = 0.41 (sec) , antiderivative size = 97, normalized size of antiderivative = 1.01 \[ \int \frac {\left (a+\frac {b}{x}\right )^8}{x^6} \, dx=\frac {- 1287 a^{8} x^{8} - 8580 a^{7} b x^{7} - 25740 a^{6} b^{2} x^{6} - 45045 a^{5} b^{3} x^{5} - 50050 a^{4} b^{4} x^{4} - 36036 a^{3} b^{5} x^{3} - 16380 a^{2} b^{6} x^{2} - 4290 a b^{7} x - 495 b^{8}}{6435 x^{13}} \]
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Time = 0.20 (sec) , antiderivative size = 90, normalized size of antiderivative = 0.94 \[ \int \frac {\left (a+\frac {b}{x}\right )^8}{x^6} \, dx=-\frac {1287 \, a^{8} x^{8} + 8580 \, a^{7} b x^{7} + 25740 \, a^{6} b^{2} x^{6} + 45045 \, a^{5} b^{3} x^{5} + 50050 \, a^{4} b^{4} x^{4} + 36036 \, a^{3} b^{5} x^{3} + 16380 \, a^{2} b^{6} x^{2} + 4290 \, a b^{7} x + 495 \, b^{8}}{6435 \, x^{13}} \]
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Time = 0.27 (sec) , antiderivative size = 90, normalized size of antiderivative = 0.94 \[ \int \frac {\left (a+\frac {b}{x}\right )^8}{x^6} \, dx=-\frac {1287 \, a^{8} x^{8} + 8580 \, a^{7} b x^{7} + 25740 \, a^{6} b^{2} x^{6} + 45045 \, a^{5} b^{3} x^{5} + 50050 \, a^{4} b^{4} x^{4} + 36036 \, a^{3} b^{5} x^{3} + 16380 \, a^{2} b^{6} x^{2} + 4290 \, a b^{7} x + 495 \, b^{8}}{6435 \, x^{13}} \]
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Time = 5.42 (sec) , antiderivative size = 90, normalized size of antiderivative = 0.94 \[ \int \frac {\left (a+\frac {b}{x}\right )^8}{x^6} \, dx=-\frac {\frac {a^8\,x^8}{5}+\frac {4\,a^7\,b\,x^7}{3}+4\,a^6\,b^2\,x^6+7\,a^5\,b^3\,x^5+\frac {70\,a^4\,b^4\,x^4}{9}+\frac {28\,a^3\,b^5\,x^3}{5}+\frac {28\,a^2\,b^6\,x^2}{11}+\frac {2\,a\,b^7\,x}{3}+\frac {b^8}{13}}{x^{13}} \]
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