Integrand size = 13, antiderivative size = 84 \[ \int \frac {(a+b x)^{3/2}}{x^4} \, dx=-\frac {b \sqrt {a+b x}}{4 x^2}-\frac {b^2 \sqrt {a+b x}}{8 a x}-\frac {(a+b x)^{3/2}}{3 x^3}+\frac {b^3 \text {arctanh}\left (\frac {\sqrt {a+b x}}{\sqrt {a}}\right )}{8 a^{3/2}} \]
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Time = 0.02 (sec) , antiderivative size = 84, normalized size of antiderivative = 1.00, number of steps used = 5, number of rules used = 4, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.308, Rules used = {43, 44, 65, 214} \[ \int \frac {(a+b x)^{3/2}}{x^4} \, dx=\frac {b^3 \text {arctanh}\left (\frac {\sqrt {a+b x}}{\sqrt {a}}\right )}{8 a^{3/2}}-\frac {b^2 \sqrt {a+b x}}{8 a x}-\frac {(a+b x)^{3/2}}{3 x^3}-\frac {b \sqrt {a+b x}}{4 x^2} \]
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Rule 43
Rule 44
Rule 65
Rule 214
Rubi steps \begin{align*} \text {integral}& = -\frac {(a+b x)^{3/2}}{3 x^3}+\frac {1}{2} b \int \frac {\sqrt {a+b x}}{x^3} \, dx \\ & = -\frac {b \sqrt {a+b x}}{4 x^2}-\frac {(a+b x)^{3/2}}{3 x^3}+\frac {1}{8} b^2 \int \frac {1}{x^2 \sqrt {a+b x}} \, dx \\ & = -\frac {b \sqrt {a+b x}}{4 x^2}-\frac {b^2 \sqrt {a+b x}}{8 a x}-\frac {(a+b x)^{3/2}}{3 x^3}-\frac {b^3 \int \frac {1}{x \sqrt {a+b x}} \, dx}{16 a} \\ & = -\frac {b \sqrt {a+b x}}{4 x^2}-\frac {b^2 \sqrt {a+b x}}{8 a x}-\frac {(a+b x)^{3/2}}{3 x^3}-\frac {b^2 \text {Subst}\left (\int \frac {1}{-\frac {a}{b}+\frac {x^2}{b}} \, dx,x,\sqrt {a+b x}\right )}{8 a} \\ & = -\frac {b \sqrt {a+b x}}{4 x^2}-\frac {b^2 \sqrt {a+b x}}{8 a x}-\frac {(a+b x)^{3/2}}{3 x^3}+\frac {b^3 \tanh ^{-1}\left (\frac {\sqrt {a+b x}}{\sqrt {a}}\right )}{8 a^{3/2}} \\ \end{align*}
Time = 0.11 (sec) , antiderivative size = 67, normalized size of antiderivative = 0.80 \[ \int \frac {(a+b x)^{3/2}}{x^4} \, dx=-\frac {\sqrt {a+b x} \left (8 a^2+14 a b x+3 b^2 x^2\right )}{24 a x^3}+\frac {b^3 \text {arctanh}\left (\frac {\sqrt {a+b x}}{\sqrt {a}}\right )}{8 a^{3/2}} \]
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Time = 0.09 (sec) , antiderivative size = 56, normalized size of antiderivative = 0.67
method | result | size |
risch | \(-\frac {\sqrt {b x +a}\, \left (3 b^{2} x^{2}+14 a b x +8 a^{2}\right )}{24 x^{3} a}+\frac {b^{3} \operatorname {arctanh}\left (\frac {\sqrt {b x +a}}{\sqrt {a}}\right )}{8 a^{\frac {3}{2}}}\) | \(56\) |
pseudoelliptic | \(\frac {\operatorname {arctanh}\left (\frac {\sqrt {b x +a}}{\sqrt {a}}\right ) b^{3} x^{3}-\sqrt {b x +a}\, \left (\sqrt {a}\, b^{2} x^{2}+\frac {14 a^{\frac {3}{2}} b x}{3}+\frac {8 a^{\frac {5}{2}}}{3}\right )}{8 a^{\frac {3}{2}} x^{3}}\) | \(61\) |
derivativedivides | \(2 b^{3} \left (-\frac {\frac {\left (b x +a \right )^{\frac {5}{2}}}{16 a}+\frac {\left (b x +a \right )^{\frac {3}{2}}}{6}-\frac {a \sqrt {b x +a}}{16}}{b^{3} x^{3}}+\frac {\operatorname {arctanh}\left (\frac {\sqrt {b x +a}}{\sqrt {a}}\right )}{16 a^{\frac {3}{2}}}\right )\) | \(64\) |
default | \(2 b^{3} \left (-\frac {\frac {\left (b x +a \right )^{\frac {5}{2}}}{16 a}+\frac {\left (b x +a \right )^{\frac {3}{2}}}{6}-\frac {a \sqrt {b x +a}}{16}}{b^{3} x^{3}}+\frac {\operatorname {arctanh}\left (\frac {\sqrt {b x +a}}{\sqrt {a}}\right )}{16 a^{\frac {3}{2}}}\right )\) | \(64\) |
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Time = 0.24 (sec) , antiderivative size = 145, normalized size of antiderivative = 1.73 \[ \int \frac {(a+b x)^{3/2}}{x^4} \, dx=\left [\frac {3 \, \sqrt {a} b^{3} x^{3} \log \left (\frac {b x + 2 \, \sqrt {b x + a} \sqrt {a} + 2 \, a}{x}\right ) - 2 \, {\left (3 \, a b^{2} x^{2} + 14 \, a^{2} b x + 8 \, a^{3}\right )} \sqrt {b x + a}}{48 \, a^{2} x^{3}}, -\frac {3 \, \sqrt {-a} b^{3} x^{3} \arctan \left (\frac {\sqrt {b x + a} \sqrt {-a}}{a}\right ) + {\left (3 \, a b^{2} x^{2} + 14 \, a^{2} b x + 8 \, a^{3}\right )} \sqrt {b x + a}}{24 \, a^{2} x^{3}}\right ] \]
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Time = 3.87 (sec) , antiderivative size = 124, normalized size of antiderivative = 1.48 \[ \int \frac {(a+b x)^{3/2}}{x^4} \, dx=- \frac {a^{2}}{3 \sqrt {b} x^{\frac {7}{2}} \sqrt {\frac {a}{b x} + 1}} - \frac {11 a \sqrt {b}}{12 x^{\frac {5}{2}} \sqrt {\frac {a}{b x} + 1}} - \frac {17 b^{\frac {3}{2}}}{24 x^{\frac {3}{2}} \sqrt {\frac {a}{b x} + 1}} - \frac {b^{\frac {5}{2}}}{8 a \sqrt {x} \sqrt {\frac {a}{b x} + 1}} + \frac {b^{3} \operatorname {asinh}{\left (\frac {\sqrt {a}}{\sqrt {b} \sqrt {x}} \right )}}{8 a^{\frac {3}{2}}} \]
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Time = 0.28 (sec) , antiderivative size = 119, normalized size of antiderivative = 1.42 \[ \int \frac {(a+b x)^{3/2}}{x^4} \, dx=-\frac {b^{3} \log \left (\frac {\sqrt {b x + a} - \sqrt {a}}{\sqrt {b x + a} + \sqrt {a}}\right )}{16 \, a^{\frac {3}{2}}} - \frac {3 \, {\left (b x + a\right )}^{\frac {5}{2}} b^{3} + 8 \, {\left (b x + a\right )}^{\frac {3}{2}} a b^{3} - 3 \, \sqrt {b x + a} a^{2} b^{3}}{24 \, {\left ({\left (b x + a\right )}^{3} a - 3 \, {\left (b x + a\right )}^{2} a^{2} + 3 \, {\left (b x + a\right )} a^{3} - a^{4}\right )}} \]
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Time = 0.30 (sec) , antiderivative size = 84, normalized size of antiderivative = 1.00 \[ \int \frac {(a+b x)^{3/2}}{x^4} \, dx=-\frac {\frac {3 \, b^{4} \arctan \left (\frac {\sqrt {b x + a}}{\sqrt {-a}}\right )}{\sqrt {-a} a} + \frac {3 \, {\left (b x + a\right )}^{\frac {5}{2}} b^{4} + 8 \, {\left (b x + a\right )}^{\frac {3}{2}} a b^{4} - 3 \, \sqrt {b x + a} a^{2} b^{4}}{a b^{3} x^{3}}}{24 \, b} \]
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Time = 0.15 (sec) , antiderivative size = 64, normalized size of antiderivative = 0.76 \[ \int \frac {(a+b x)^{3/2}}{x^4} \, dx=\frac {a\,\sqrt {a+b\,x}}{8\,x^3}-\frac {{\left (a+b\,x\right )}^{5/2}}{8\,a\,x^3}-\frac {{\left (a+b\,x\right )}^{3/2}}{3\,x^3}-\frac {b^3\,\mathrm {atan}\left (\frac {\sqrt {a+b\,x}\,1{}\mathrm {i}}{\sqrt {a}}\right )\,1{}\mathrm {i}}{8\,a^{3/2}} \]
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