Integrand size = 12, antiderivative size = 109 \[ \int \frac {x^3}{\sqrt {\text {arccosh}(a x)}} \, dx=-\frac {\sqrt {\pi } \text {erf}\left (2 \sqrt {\text {arccosh}(a x)}\right )}{32 a^4}-\frac {\sqrt {\frac {\pi }{2}} \text {erf}\left (\sqrt {2} \sqrt {\text {arccosh}(a x)}\right )}{8 a^4}+\frac {\sqrt {\pi } \text {erfi}\left (2 \sqrt {\text {arccosh}(a x)}\right )}{32 a^4}+\frac {\sqrt {\frac {\pi }{2}} \text {erfi}\left (\sqrt {2} \sqrt {\text {arccosh}(a x)}\right )}{8 a^4} \]
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Time = 0.10 (sec) , antiderivative size = 109, normalized size of antiderivative = 1.00, number of steps used = 13, number of rules used = 6, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.500, Rules used = {5887, 5556, 3389, 2211, 2235, 2236} \[ \int \frac {x^3}{\sqrt {\text {arccosh}(a x)}} \, dx=-\frac {\sqrt {\pi } \text {erf}\left (2 \sqrt {\text {arccosh}(a x)}\right )}{32 a^4}-\frac {\sqrt {\frac {\pi }{2}} \text {erf}\left (\sqrt {2} \sqrt {\text {arccosh}(a x)}\right )}{8 a^4}+\frac {\sqrt {\pi } \text {erfi}\left (2 \sqrt {\text {arccosh}(a x)}\right )}{32 a^4}+\frac {\sqrt {\frac {\pi }{2}} \text {erfi}\left (\sqrt {2} \sqrt {\text {arccosh}(a x)}\right )}{8 a^4} \]
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Rule 2211
Rule 2235
Rule 2236
Rule 3389
Rule 5556
Rule 5887
Rubi steps \begin{align*} \text {integral}& = \frac {\text {Subst}\left (\int \frac {\cosh ^3(x) \sinh (x)}{\sqrt {x}} \, dx,x,\text {arccosh}(a x)\right )}{a^4} \\ & = \frac {\text {Subst}\left (\int \left (\frac {\sinh (2 x)}{4 \sqrt {x}}+\frac {\sinh (4 x)}{8 \sqrt {x}}\right ) \, dx,x,\text {arccosh}(a x)\right )}{a^4} \\ & = \frac {\text {Subst}\left (\int \frac {\sinh (4 x)}{\sqrt {x}} \, dx,x,\text {arccosh}(a x)\right )}{8 a^4}+\frac {\text {Subst}\left (\int \frac {\sinh (2 x)}{\sqrt {x}} \, dx,x,\text {arccosh}(a x)\right )}{4 a^4} \\ & = -\frac {\text {Subst}\left (\int \frac {e^{-4 x}}{\sqrt {x}} \, dx,x,\text {arccosh}(a x)\right )}{16 a^4}+\frac {\text {Subst}\left (\int \frac {e^{4 x}}{\sqrt {x}} \, dx,x,\text {arccosh}(a x)\right )}{16 a^4}-\frac {\text {Subst}\left (\int \frac {e^{-2 x}}{\sqrt {x}} \, dx,x,\text {arccosh}(a x)\right )}{8 a^4}+\frac {\text {Subst}\left (\int \frac {e^{2 x}}{\sqrt {x}} \, dx,x,\text {arccosh}(a x)\right )}{8 a^4} \\ & = -\frac {\text {Subst}\left (\int e^{-4 x^2} \, dx,x,\sqrt {\text {arccosh}(a x)}\right )}{8 a^4}+\frac {\text {Subst}\left (\int e^{4 x^2} \, dx,x,\sqrt {\text {arccosh}(a x)}\right )}{8 a^4}-\frac {\text {Subst}\left (\int e^{-2 x^2} \, dx,x,\sqrt {\text {arccosh}(a x)}\right )}{4 a^4}+\frac {\text {Subst}\left (\int e^{2 x^2} \, dx,x,\sqrt {\text {arccosh}(a x)}\right )}{4 a^4} \\ & = -\frac {\sqrt {\pi } \text {erf}\left (2 \sqrt {\text {arccosh}(a x)}\right )}{32 a^4}-\frac {\sqrt {\frac {\pi }{2}} \text {erf}\left (\sqrt {2} \sqrt {\text {arccosh}(a x)}\right )}{8 a^4}+\frac {\sqrt {\pi } \text {erfi}\left (2 \sqrt {\text {arccosh}(a x)}\right )}{32 a^4}+\frac {\sqrt {\frac {\pi }{2}} \text {erfi}\left (\sqrt {2} \sqrt {\text {arccosh}(a x)}\right )}{8 a^4} \\ \end{align*}
Time = 0.07 (sec) , antiderivative size = 101, normalized size of antiderivative = 0.93 \[ \int \frac {x^3}{\sqrt {\text {arccosh}(a x)}} \, dx=\frac {\sqrt {-\text {arccosh}(a x)} \Gamma \left (\frac {1}{2},-4 \text {arccosh}(a x)\right )+2 \sqrt {2} \sqrt {-\text {arccosh}(a x)} \Gamma \left (\frac {1}{2},-2 \text {arccosh}(a x)\right )+\sqrt {\text {arccosh}(a x)} \left (2 \sqrt {2} \Gamma \left (\frac {1}{2},2 \text {arccosh}(a x)\right )+\Gamma \left (\frac {1}{2},4 \text {arccosh}(a x)\right )\right )}{32 a^4 \sqrt {\text {arccosh}(a x)}} \]
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Time = 1.01 (sec) , antiderivative size = 67, normalized size of antiderivative = 0.61
method | result | size |
default | \(-\frac {\sqrt {\pi }\, \sqrt {2}\, \left (\operatorname {erf}\left (\sqrt {2}\, \sqrt {\operatorname {arccosh}\left (a x \right )}\right )-\operatorname {erfi}\left (\sqrt {2}\, \sqrt {\operatorname {arccosh}\left (a x \right )}\right )\right )}{16 a^{4}}-\frac {\sqrt {\pi }\, \left (\operatorname {erf}\left (2 \sqrt {\operatorname {arccosh}\left (a x \right )}\right )-\operatorname {erfi}\left (2 \sqrt {\operatorname {arccosh}\left (a x \right )}\right )\right )}{32 a^{4}}\) | \(67\) |
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Exception generated. \[ \int \frac {x^3}{\sqrt {\text {arccosh}(a x)}} \, dx=\text {Exception raised: TypeError} \]
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\[ \int \frac {x^3}{\sqrt {\text {arccosh}(a x)}} \, dx=\int \frac {x^{3}}{\sqrt {\operatorname {acosh}{\left (a x \right )}}}\, dx \]
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\[ \int \frac {x^3}{\sqrt {\text {arccosh}(a x)}} \, dx=\int { \frac {x^{3}}{\sqrt {\operatorname {arcosh}\left (a x\right )}} \,d x } \]
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Exception generated. \[ \int \frac {x^3}{\sqrt {\text {arccosh}(a x)}} \, dx=\text {Exception raised: TypeError} \]
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Timed out. \[ \int \frac {x^3}{\sqrt {\text {arccosh}(a x)}} \, dx=\int \frac {x^3}{\sqrt {\mathrm {acosh}\left (a\,x\right )}} \,d x \]
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