Integrand size = 19, antiderivative size = 74 \[ \int \frac {\left (a x^2+b x^3\right )^{3/2}}{x^4} \, dx=\frac {2 a \sqrt {a x^2+b x^3}}{x}+\frac {2 \left (a x^2+b x^3\right )^{3/2}}{3 x^3}-2 a^{3/2} \text {arctanh}\left (\frac {\sqrt {a} x}{\sqrt {a x^2+b x^3}}\right ) \]
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Time = 0.06 (sec) , antiderivative size = 74, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.158, Rules used = {2046, 2033, 212} \[ \int \frac {\left (a x^2+b x^3\right )^{3/2}}{x^4} \, dx=-2 a^{3/2} \text {arctanh}\left (\frac {\sqrt {a} x}{\sqrt {a x^2+b x^3}}\right )+\frac {2 a \sqrt {a x^2+b x^3}}{x}+\frac {2 \left (a x^2+b x^3\right )^{3/2}}{3 x^3} \]
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Rule 212
Rule 2033
Rule 2046
Rubi steps \begin{align*} \text {integral}& = \frac {2 \left (a x^2+b x^3\right )^{3/2}}{3 x^3}+a \int \frac {\sqrt {a x^2+b x^3}}{x^2} \, dx \\ & = \frac {2 a \sqrt {a x^2+b x^3}}{x}+\frac {2 \left (a x^2+b x^3\right )^{3/2}}{3 x^3}+a^2 \int \frac {1}{\sqrt {a x^2+b x^3}} \, dx \\ & = \frac {2 a \sqrt {a x^2+b x^3}}{x}+\frac {2 \left (a x^2+b x^3\right )^{3/2}}{3 x^3}-\left (2 a^2\right ) \text {Subst}\left (\int \frac {1}{1-a x^2} \, dx,x,\frac {x}{\sqrt {a x^2+b x^3}}\right ) \\ & = \frac {2 a \sqrt {a x^2+b x^3}}{x}+\frac {2 \left (a x^2+b x^3\right )^{3/2}}{3 x^3}-2 a^{3/2} \tanh ^{-1}\left (\frac {\sqrt {a} x}{\sqrt {a x^2+b x^3}}\right ) \\ \end{align*}
Time = 0.05 (sec) , antiderivative size = 68, normalized size of antiderivative = 0.92 \[ \int \frac {\left (a x^2+b x^3\right )^{3/2}}{x^4} \, dx=\frac {2 x \sqrt {a+b x} \left (\sqrt {a+b x} (4 a+b x)-3 a^{3/2} \text {arctanh}\left (\frac {\sqrt {a+b x}}{\sqrt {a}}\right )\right )}{3 \sqrt {x^2 (a+b x)}} \]
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Time = 2.02 (sec) , antiderivative size = 61, normalized size of antiderivative = 0.82
method | result | size |
pseudoelliptic | \(\frac {\operatorname {arctanh}\left (\frac {\sqrt {b x +a}}{\sqrt {a}}\right ) b^{3} x^{3}-\sqrt {b x +a}\, \left (\sqrt {a}\, b^{2} x^{2}+\frac {14 a^{\frac {3}{2}} b x}{3}+\frac {8 a^{\frac {5}{2}}}{3}\right )}{8 a^{\frac {3}{2}} x^{3}}\) | \(61\) |
default | \(-\frac {2 \left (b \,x^{3}+a \,x^{2}\right )^{\frac {3}{2}} \left (3 a^{\frac {3}{2}} \operatorname {arctanh}\left (\frac {\sqrt {b x +a}}{\sqrt {a}}\right )-\left (b x +a \right )^{\frac {3}{2}}-3 \sqrt {b x +a}\, a \right )}{3 x^{3} \left (b x +a \right )^{\frac {3}{2}}}\) | \(63\) |
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Time = 0.28 (sec) , antiderivative size = 130, normalized size of antiderivative = 1.76 \[ \int \frac {\left (a x^2+b x^3\right )^{3/2}}{x^4} \, dx=\left [\frac {3 \, a^{\frac {3}{2}} x \log \left (\frac {b x^{2} + 2 \, a x - 2 \, \sqrt {b x^{3} + a x^{2}} \sqrt {a}}{x^{2}}\right ) + 2 \, \sqrt {b x^{3} + a x^{2}} {\left (b x + 4 \, a\right )}}{3 \, x}, \frac {2 \, {\left (3 \, \sqrt {-a} a x \arctan \left (\frac {\sqrt {b x^{3} + a x^{2}} \sqrt {-a}}{a x}\right ) + \sqrt {b x^{3} + a x^{2}} {\left (b x + 4 \, a\right )}\right )}}{3 \, x}\right ] \]
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\[ \int \frac {\left (a x^2+b x^3\right )^{3/2}}{x^4} \, dx=\int \frac {\left (x^{2} \left (a + b x\right )\right )^{\frac {3}{2}}}{x^{4}}\, dx \]
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\[ \int \frac {\left (a x^2+b x^3\right )^{3/2}}{x^4} \, dx=\int { \frac {{\left (b x^{3} + a x^{2}\right )}^{\frac {3}{2}}}{x^{4}} \,d x } \]
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Time = 0.28 (sec) , antiderivative size = 85, normalized size of antiderivative = 1.15 \[ \int \frac {\left (a x^2+b x^3\right )^{3/2}}{x^4} \, dx=\frac {2 \, a^{2} \arctan \left (\frac {\sqrt {b x + a}}{\sqrt {-a}}\right ) \mathrm {sgn}\left (x\right )}{\sqrt {-a}} + \frac {2}{3} \, {\left (b x + a\right )}^{\frac {3}{2}} \mathrm {sgn}\left (x\right ) + 2 \, \sqrt {b x + a} a \mathrm {sgn}\left (x\right ) - \frac {2 \, {\left (3 \, a^{2} \arctan \left (\frac {\sqrt {a}}{\sqrt {-a}}\right ) + 4 \, \sqrt {-a} a^{\frac {3}{2}}\right )} \mathrm {sgn}\left (x\right )}{3 \, \sqrt {-a}} \]
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Timed out. \[ \int \frac {\left (a x^2+b x^3\right )^{3/2}}{x^4} \, dx=\int \frac {{\left (b\,x^3+a\,x^2\right )}^{3/2}}{x^4} \,d x \]
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