Integrand size = 13, antiderivative size = 97 \[ \int \frac {(a+b x)^{9/2}}{x} \, dx=2 a^4 \sqrt {a+b x}+\frac {2}{3} a^3 (a+b x)^{3/2}+\frac {2}{5} a^2 (a+b x)^{5/2}+\frac {2}{7} a (a+b x)^{7/2}+\frac {2}{9} (a+b x)^{9/2}-2 a^{9/2} \text {arctanh}\left (\frac {\sqrt {a+b x}}{\sqrt {a}}\right ) \]
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Time = 0.02 (sec) , antiderivative size = 97, normalized size of antiderivative = 1.00, number of steps used = 7, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.231, Rules used = {52, 65, 214} \[ \int \frac {(a+b x)^{9/2}}{x} \, dx=-2 a^{9/2} \text {arctanh}\left (\frac {\sqrt {a+b x}}{\sqrt {a}}\right )+2 a^4 \sqrt {a+b x}+\frac {2}{3} a^3 (a+b x)^{3/2}+\frac {2}{5} a^2 (a+b x)^{5/2}+\frac {2}{7} a (a+b x)^{7/2}+\frac {2}{9} (a+b x)^{9/2} \]
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Rule 52
Rule 65
Rule 214
Rubi steps \begin{align*} \text {integral}& = \frac {2}{9} (a+b x)^{9/2}+a \int \frac {(a+b x)^{7/2}}{x} \, dx \\ & = \frac {2}{7} a (a+b x)^{7/2}+\frac {2}{9} (a+b x)^{9/2}+a^2 \int \frac {(a+b x)^{5/2}}{x} \, dx \\ & = \frac {2}{5} a^2 (a+b x)^{5/2}+\frac {2}{7} a (a+b x)^{7/2}+\frac {2}{9} (a+b x)^{9/2}+a^3 \int \frac {(a+b x)^{3/2}}{x} \, dx \\ & = \frac {2}{3} a^3 (a+b x)^{3/2}+\frac {2}{5} a^2 (a+b x)^{5/2}+\frac {2}{7} a (a+b x)^{7/2}+\frac {2}{9} (a+b x)^{9/2}+a^4 \int \frac {\sqrt {a+b x}}{x} \, dx \\ & = 2 a^4 \sqrt {a+b x}+\frac {2}{3} a^3 (a+b x)^{3/2}+\frac {2}{5} a^2 (a+b x)^{5/2}+\frac {2}{7} a (a+b x)^{7/2}+\frac {2}{9} (a+b x)^{9/2}+a^5 \int \frac {1}{x \sqrt {a+b x}} \, dx \\ & = 2 a^4 \sqrt {a+b x}+\frac {2}{3} a^3 (a+b x)^{3/2}+\frac {2}{5} a^2 (a+b x)^{5/2}+\frac {2}{7} a (a+b x)^{7/2}+\frac {2}{9} (a+b x)^{9/2}+\frac {\left (2 a^5\right ) \text {Subst}\left (\int \frac {1}{-\frac {a}{b}+\frac {x^2}{b}} \, dx,x,\sqrt {a+b x}\right )}{b} \\ & = 2 a^4 \sqrt {a+b x}+\frac {2}{3} a^3 (a+b x)^{3/2}+\frac {2}{5} a^2 (a+b x)^{5/2}+\frac {2}{7} a (a+b x)^{7/2}+\frac {2}{9} (a+b x)^{9/2}-2 a^{9/2} \tanh ^{-1}\left (\frac {\sqrt {a+b x}}{\sqrt {a}}\right ) \\ \end{align*}
Time = 0.05 (sec) , antiderivative size = 78, normalized size of antiderivative = 0.80 \[ \int \frac {(a+b x)^{9/2}}{x} \, dx=\frac {2}{315} \sqrt {a+b x} \left (563 a^4+506 a^3 b x+408 a^2 b^2 x^2+185 a b^3 x^3+35 b^4 x^4\right )-2 a^{9/2} \text {arctanh}\left (\frac {\sqrt {a+b x}}{\sqrt {a}}\right ) \]
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Time = 0.08 (sec) , antiderivative size = 69, normalized size of antiderivative = 0.71
method | result | size |
pseudoelliptic | \(-2 a^{\frac {9}{2}} \operatorname {arctanh}\left (\frac {\sqrt {b x +a}}{\sqrt {a}}\right )+\frac {2 \sqrt {b x +a}\, \left (35 b^{4} x^{4}+185 a \,b^{3} x^{3}+408 a^{2} b^{2} x^{2}+506 a^{3} b x +563 a^{4}\right )}{315}\) | \(69\) |
derivativedivides | \(\frac {2 a^{3} \left (b x +a \right )^{\frac {3}{2}}}{3}+\frac {2 a^{2} \left (b x +a \right )^{\frac {5}{2}}}{5}+\frac {2 a \left (b x +a \right )^{\frac {7}{2}}}{7}+\frac {2 \left (b x +a \right )^{\frac {9}{2}}}{9}-2 a^{\frac {9}{2}} \operatorname {arctanh}\left (\frac {\sqrt {b x +a}}{\sqrt {a}}\right )+2 a^{4} \sqrt {b x +a}\) | \(74\) |
default | \(\frac {2 a^{3} \left (b x +a \right )^{\frac {3}{2}}}{3}+\frac {2 a^{2} \left (b x +a \right )^{\frac {5}{2}}}{5}+\frac {2 a \left (b x +a \right )^{\frac {7}{2}}}{7}+\frac {2 \left (b x +a \right )^{\frac {9}{2}}}{9}-2 a^{\frac {9}{2}} \operatorname {arctanh}\left (\frac {\sqrt {b x +a}}{\sqrt {a}}\right )+2 a^{4} \sqrt {b x +a}\) | \(74\) |
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Time = 0.23 (sec) , antiderivative size = 158, normalized size of antiderivative = 1.63 \[ \int \frac {(a+b x)^{9/2}}{x} \, dx=\left [a^{\frac {9}{2}} \log \left (\frac {b x - 2 \, \sqrt {b x + a} \sqrt {a} + 2 \, a}{x}\right ) + \frac {2}{315} \, {\left (35 \, b^{4} x^{4} + 185 \, a b^{3} x^{3} + 408 \, a^{2} b^{2} x^{2} + 506 \, a^{3} b x + 563 \, a^{4}\right )} \sqrt {b x + a}, 2 \, \sqrt {-a} a^{4} \arctan \left (\frac {\sqrt {b x + a} \sqrt {-a}}{a}\right ) + \frac {2}{315} \, {\left (35 \, b^{4} x^{4} + 185 \, a b^{3} x^{3} + 408 \, a^{2} b^{2} x^{2} + 506 \, a^{3} b x + 563 \, a^{4}\right )} \sqrt {b x + a}\right ] \]
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Time = 15.93 (sec) , antiderivative size = 148, normalized size of antiderivative = 1.53 \[ \int \frac {(a+b x)^{9/2}}{x} \, dx=\frac {1126 a^{\frac {9}{2}} \sqrt {1 + \frac {b x}{a}}}{315} + a^{\frac {9}{2}} \log {\left (\frac {b x}{a} \right )} - 2 a^{\frac {9}{2}} \log {\left (\sqrt {1 + \frac {b x}{a}} + 1 \right )} + \frac {1012 a^{\frac {7}{2}} b x \sqrt {1 + \frac {b x}{a}}}{315} + \frac {272 a^{\frac {5}{2}} b^{2} x^{2} \sqrt {1 + \frac {b x}{a}}}{105} + \frac {74 a^{\frac {3}{2}} b^{3} x^{3} \sqrt {1 + \frac {b x}{a}}}{63} + \frac {2 \sqrt {a} b^{4} x^{4} \sqrt {1 + \frac {b x}{a}}}{9} \]
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Time = 0.30 (sec) , antiderivative size = 88, normalized size of antiderivative = 0.91 \[ \int \frac {(a+b x)^{9/2}}{x} \, dx=a^{\frac {9}{2}} \log \left (\frac {\sqrt {b x + a} - \sqrt {a}}{\sqrt {b x + a} + \sqrt {a}}\right ) + \frac {2}{9} \, {\left (b x + a\right )}^{\frac {9}{2}} + \frac {2}{7} \, {\left (b x + a\right )}^{\frac {7}{2}} a + \frac {2}{5} \, {\left (b x + a\right )}^{\frac {5}{2}} a^{2} + \frac {2}{3} \, {\left (b x + a\right )}^{\frac {3}{2}} a^{3} + 2 \, \sqrt {b x + a} a^{4} \]
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Time = 0.30 (sec) , antiderivative size = 80, normalized size of antiderivative = 0.82 \[ \int \frac {(a+b x)^{9/2}}{x} \, dx=\frac {2 \, a^{5} \arctan \left (\frac {\sqrt {b x + a}}{\sqrt {-a}}\right )}{\sqrt {-a}} + \frac {2}{9} \, {\left (b x + a\right )}^{\frac {9}{2}} + \frac {2}{7} \, {\left (b x + a\right )}^{\frac {7}{2}} a + \frac {2}{5} \, {\left (b x + a\right )}^{\frac {5}{2}} a^{2} + \frac {2}{3} \, {\left (b x + a\right )}^{\frac {3}{2}} a^{3} + 2 \, \sqrt {b x + a} a^{4} \]
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Time = 0.05 (sec) , antiderivative size = 76, normalized size of antiderivative = 0.78 \[ \int \frac {(a+b x)^{9/2}}{x} \, dx=\frac {2\,a\,{\left (a+b\,x\right )}^{7/2}}{7}+\frac {2\,{\left (a+b\,x\right )}^{9/2}}{9}+2\,a^4\,\sqrt {a+b\,x}+\frac {2\,a^3\,{\left (a+b\,x\right )}^{3/2}}{3}+\frac {2\,a^2\,{\left (a+b\,x\right )}^{5/2}}{5}+a^{9/2}\,\mathrm {atan}\left (\frac {\sqrt {a+b\,x}\,1{}\mathrm {i}}{\sqrt {a}}\right )\,2{}\mathrm {i} \]
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