Integrand size = 11, antiderivative size = 95 \[ \int \left (a+\frac {b}{x}\right )^8 x \, dx=-\frac {b^8}{6 x^6}-\frac {8 a b^7}{5 x^5}-\frac {7 a^2 b^6}{x^4}-\frac {56 a^3 b^5}{3 x^3}-\frac {35 a^4 b^4}{x^2}-\frac {56 a^5 b^3}{x}+8 a^7 b x+\frac {a^8 x^2}{2}+28 a^6 b^2 \log (x) \]
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Time = 0.03 (sec) , antiderivative size = 95, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.182, Rules used = {269, 45} \[ \int \left (a+\frac {b}{x}\right )^8 x \, dx=\frac {a^8 x^2}{2}+8 a^7 b x+28 a^6 b^2 \log (x)-\frac {56 a^5 b^3}{x}-\frac {35 a^4 b^4}{x^2}-\frac {56 a^3 b^5}{3 x^3}-\frac {7 a^2 b^6}{x^4}-\frac {8 a b^7}{5 x^5}-\frac {b^8}{6 x^6} \]
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Rule 45
Rule 269
Rubi steps \begin{align*} \text {integral}& = \int \frac {(b+a x)^8}{x^7} \, dx \\ & = \int \left (8 a^7 b+\frac {b^8}{x^7}+\frac {8 a b^7}{x^6}+\frac {28 a^2 b^6}{x^5}+\frac {56 a^3 b^5}{x^4}+\frac {70 a^4 b^4}{x^3}+\frac {56 a^5 b^3}{x^2}+\frac {28 a^6 b^2}{x}+a^8 x\right ) \, dx \\ & = -\frac {b^8}{6 x^6}-\frac {8 a b^7}{5 x^5}-\frac {7 a^2 b^6}{x^4}-\frac {56 a^3 b^5}{3 x^3}-\frac {35 a^4 b^4}{x^2}-\frac {56 a^5 b^3}{x}+8 a^7 b x+\frac {a^8 x^2}{2}+28 a^6 b^2 \log (x) \\ \end{align*}
Time = 0.01 (sec) , antiderivative size = 95, normalized size of antiderivative = 1.00 \[ \int \left (a+\frac {b}{x}\right )^8 x \, dx=-\frac {b^8}{6 x^6}-\frac {8 a b^7}{5 x^5}-\frac {7 a^2 b^6}{x^4}-\frac {56 a^3 b^5}{3 x^3}-\frac {35 a^4 b^4}{x^2}-\frac {56 a^5 b^3}{x}+8 a^7 b x+\frac {a^8 x^2}{2}+28 a^6 b^2 \log (x) \]
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Time = 0.03 (sec) , antiderivative size = 88, normalized size of antiderivative = 0.93
method | result | size |
default | \(-\frac {b^{8}}{6 x^{6}}-\frac {8 a \,b^{7}}{5 x^{5}}-\frac {7 a^{2} b^{6}}{x^{4}}-\frac {56 a^{3} b^{5}}{3 x^{3}}-\frac {35 a^{4} b^{4}}{x^{2}}-\frac {56 a^{5} b^{3}}{x}+8 a^{7} x b +\frac {a^{8} x^{2}}{2}+28 a^{6} b^{2} \ln \left (x \right )\) | \(88\) |
risch | \(\frac {a^{8} x^{2}}{2}+8 a^{7} x b +\frac {-56 a^{5} b^{3} x^{5}-35 a^{4} x^{4} b^{4}-\frac {56}{3} a^{3} b^{5} x^{3}-7 a^{2} b^{6} x^{2}-\frac {8}{5} a \,b^{7} x -\frac {1}{6} b^{8}}{x^{6}}+28 a^{6} b^{2} \ln \left (x \right )\) | \(88\) |
norman | \(\frac {-\frac {1}{6} b^{8} x +\frac {1}{2} x^{9} a^{8}-\frac {8}{5} a \,b^{7} x^{2}-7 a^{2} b^{6} x^{3}-\frac {56}{3} a^{3} b^{5} x^{4}-35 a^{4} b^{4} x^{5}+8 a^{7} b \,x^{8}-56 x^{6} b^{3} a^{5}}{x^{7}}+28 a^{6} b^{2} \ln \left (x \right )\) | \(93\) |
parallelrisch | \(\frac {15 a^{8} x^{8}+840 a^{6} b^{2} \ln \left (x \right ) x^{6}+240 x^{7} b \,a^{7}-1680 a^{5} b^{3} x^{5}-1050 a^{4} x^{4} b^{4}-560 a^{3} b^{5} x^{3}-210 a^{2} b^{6} x^{2}-48 a \,b^{7} x -5 b^{8}}{30 x^{6}}\) | \(93\) |
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Time = 0.26 (sec) , antiderivative size = 92, normalized size of antiderivative = 0.97 \[ \int \left (a+\frac {b}{x}\right )^8 x \, dx=\frac {15 \, a^{8} x^{8} + 240 \, a^{7} b x^{7} + 840 \, a^{6} b^{2} x^{6} \log \left (x\right ) - 1680 \, a^{5} b^{3} x^{5} - 1050 \, a^{4} b^{4} x^{4} - 560 \, a^{3} b^{5} x^{3} - 210 \, a^{2} b^{6} x^{2} - 48 \, a b^{7} x - 5 \, b^{8}}{30 \, x^{6}} \]
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Time = 0.22 (sec) , antiderivative size = 95, normalized size of antiderivative = 1.00 \[ \int \left (a+\frac {b}{x}\right )^8 x \, dx=\frac {a^{8} x^{2}}{2} + 8 a^{7} b x + 28 a^{6} b^{2} \log {\left (x \right )} + \frac {- 1680 a^{5} b^{3} x^{5} - 1050 a^{4} b^{4} x^{4} - 560 a^{3} b^{5} x^{3} - 210 a^{2} b^{6} x^{2} - 48 a b^{7} x - 5 b^{8}}{30 x^{6}} \]
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Time = 0.21 (sec) , antiderivative size = 88, normalized size of antiderivative = 0.93 \[ \int \left (a+\frac {b}{x}\right )^8 x \, dx=\frac {1}{2} \, a^{8} x^{2} + 8 \, a^{7} b x + 28 \, a^{6} b^{2} \log \left (x\right ) - \frac {1680 \, a^{5} b^{3} x^{5} + 1050 \, a^{4} b^{4} x^{4} + 560 \, a^{3} b^{5} x^{3} + 210 \, a^{2} b^{6} x^{2} + 48 \, a b^{7} x + 5 \, b^{8}}{30 \, x^{6}} \]
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Time = 0.29 (sec) , antiderivative size = 89, normalized size of antiderivative = 0.94 \[ \int \left (a+\frac {b}{x}\right )^8 x \, dx=\frac {1}{2} \, a^{8} x^{2} + 8 \, a^{7} b x + 28 \, a^{6} b^{2} \log \left ({\left | x \right |}\right ) - \frac {1680 \, a^{5} b^{3} x^{5} + 1050 \, a^{4} b^{4} x^{4} + 560 \, a^{3} b^{5} x^{3} + 210 \, a^{2} b^{6} x^{2} + 48 \, a b^{7} x + 5 \, b^{8}}{30 \, x^{6}} \]
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Time = 5.41 (sec) , antiderivative size = 88, normalized size of antiderivative = 0.93 \[ \int \left (a+\frac {b}{x}\right )^8 x \, dx=\frac {a^8\,x^2}{2}-\frac {56\,a^5\,b^3\,x^5+35\,a^4\,b^4\,x^4+\frac {56\,a^3\,b^5\,x^3}{3}+7\,a^2\,b^6\,x^2+\frac {8\,a\,b^7\,x}{5}+\frac {b^8}{6}}{x^6}+28\,a^6\,b^2\,\ln \left (x\right )+8\,a^7\,b\,x \]
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