Integrand size = 14, antiderivative size = 145 \[ \int x \sqrt {a+b \text {arcsinh}(c x)} \, dx=\frac {\sqrt {a+b \text {arcsinh}(c x)}}{4 c^2}+\frac {1}{2} x^2 \sqrt {a+b \text {arcsinh}(c x)}-\frac {\sqrt {b} e^{\frac {2 a}{b}} \sqrt {\frac {\pi }{2}} \text {erf}\left (\frac {\sqrt {2} \sqrt {a+b \text {arcsinh}(c x)}}{\sqrt {b}}\right )}{16 c^2}-\frac {\sqrt {b} e^{-\frac {2 a}{b}} \sqrt {\frac {\pi }{2}} \text {erfi}\left (\frac {\sqrt {2} \sqrt {a+b \text {arcsinh}(c x)}}{\sqrt {b}}\right )}{16 c^2} \]
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Time = 0.27 (sec) , antiderivative size = 145, normalized size of antiderivative = 1.00, number of steps used = 9, number of rules used = 7, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.500, Rules used = {5777, 5819, 3393, 3388, 2211, 2236, 2235} \[ \int x \sqrt {a+b \text {arcsinh}(c x)} \, dx=-\frac {\sqrt {\frac {\pi }{2}} \sqrt {b} e^{\frac {2 a}{b}} \text {erf}\left (\frac {\sqrt {2} \sqrt {a+b \text {arcsinh}(c x)}}{\sqrt {b}}\right )}{16 c^2}-\frac {\sqrt {\frac {\pi }{2}} \sqrt {b} e^{-\frac {2 a}{b}} \text {erfi}\left (\frac {\sqrt {2} \sqrt {a+b \text {arcsinh}(c x)}}{\sqrt {b}}\right )}{16 c^2}+\frac {\sqrt {a+b \text {arcsinh}(c x)}}{4 c^2}+\frac {1}{2} x^2 \sqrt {a+b \text {arcsinh}(c x)} \]
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Rule 2211
Rule 2235
Rule 2236
Rule 3388
Rule 3393
Rule 5777
Rule 5819
Rubi steps \begin{align*} \text {integral}& = \frac {1}{2} x^2 \sqrt {a+b \text {arcsinh}(c x)}-\frac {1}{4} (b c) \int \frac {x^2}{\sqrt {1+c^2 x^2} \sqrt {a+b \text {arcsinh}(c x)}} \, dx \\ & = \frac {1}{2} x^2 \sqrt {a+b \text {arcsinh}(c x)}-\frac {\text {Subst}\left (\int \frac {\sinh ^2\left (\frac {a}{b}-\frac {x}{b}\right )}{\sqrt {x}} \, dx,x,a+b \text {arcsinh}(c x)\right )}{4 c^2} \\ & = \frac {1}{2} x^2 \sqrt {a+b \text {arcsinh}(c x)}+\frac {\text {Subst}\left (\int \left (\frac {1}{2 \sqrt {x}}-\frac {\cosh \left (\frac {2 a}{b}-\frac {2 x}{b}\right )}{2 \sqrt {x}}\right ) \, dx,x,a+b \text {arcsinh}(c x)\right )}{4 c^2} \\ & = \frac {\sqrt {a+b \text {arcsinh}(c x)}}{4 c^2}+\frac {1}{2} x^2 \sqrt {a+b \text {arcsinh}(c x)}-\frac {\text {Subst}\left (\int \frac {\cosh \left (\frac {2 a}{b}-\frac {2 x}{b}\right )}{\sqrt {x}} \, dx,x,a+b \text {arcsinh}(c x)\right )}{8 c^2} \\ & = \frac {\sqrt {a+b \text {arcsinh}(c x)}}{4 c^2}+\frac {1}{2} x^2 \sqrt {a+b \text {arcsinh}(c x)}-\frac {\text {Subst}\left (\int \frac {e^{-i \left (\frac {2 i a}{b}-\frac {2 i x}{b}\right )}}{\sqrt {x}} \, dx,x,a+b \text {arcsinh}(c x)\right )}{16 c^2}-\frac {\text {Subst}\left (\int \frac {e^{i \left (\frac {2 i a}{b}-\frac {2 i x}{b}\right )}}{\sqrt {x}} \, dx,x,a+b \text {arcsinh}(c x)\right )}{16 c^2} \\ & = \frac {\sqrt {a+b \text {arcsinh}(c x)}}{4 c^2}+\frac {1}{2} x^2 \sqrt {a+b \text {arcsinh}(c x)}-\frac {\text {Subst}\left (\int e^{\frac {2 a}{b}-\frac {2 x^2}{b}} \, dx,x,\sqrt {a+b \text {arcsinh}(c x)}\right )}{8 c^2}-\frac {\text {Subst}\left (\int e^{-\frac {2 a}{b}+\frac {2 x^2}{b}} \, dx,x,\sqrt {a+b \text {arcsinh}(c x)}\right )}{8 c^2} \\ & = \frac {\sqrt {a+b \text {arcsinh}(c x)}}{4 c^2}+\frac {1}{2} x^2 \sqrt {a+b \text {arcsinh}(c x)}-\frac {\sqrt {b} e^{\frac {2 a}{b}} \sqrt {\frac {\pi }{2}} \text {erf}\left (\frac {\sqrt {2} \sqrt {a+b \text {arcsinh}(c x)}}{\sqrt {b}}\right )}{16 c^2}-\frac {\sqrt {b} e^{-\frac {2 a}{b}} \sqrt {\frac {\pi }{2}} \text {erfi}\left (\frac {\sqrt {2} \sqrt {a+b \text {arcsinh}(c x)}}{\sqrt {b}}\right )}{16 c^2} \\ \end{align*}
Time = 0.06 (sec) , antiderivative size = 111, normalized size of antiderivative = 0.77 \[ \int x \sqrt {a+b \text {arcsinh}(c x)} \, dx=\frac {e^{-\frac {2 a}{b}} \left (-b \sqrt {-\frac {a+b \text {arcsinh}(c x)}{b}} \Gamma \left (\frac {3}{2},-\frac {2 (a+b \text {arcsinh}(c x))}{b}\right )+b e^{\frac {4 a}{b}} \sqrt {\frac {a}{b}+\text {arcsinh}(c x)} \Gamma \left (\frac {3}{2},\frac {2 (a+b \text {arcsinh}(c x))}{b}\right )\right )}{8 \sqrt {2} c^2 \sqrt {a+b \text {arcsinh}(c x)}} \]
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\[\int x \sqrt {a +b \,\operatorname {arcsinh}\left (c x \right )}d x\]
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Exception generated. \[ \int x \sqrt {a+b \text {arcsinh}(c x)} \, dx=\text {Exception raised: TypeError} \]
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\[ \int x \sqrt {a+b \text {arcsinh}(c x)} \, dx=\int x \sqrt {a + b \operatorname {asinh}{\left (c x \right )}}\, dx \]
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\[ \int x \sqrt {a+b \text {arcsinh}(c x)} \, dx=\int { \sqrt {b \operatorname {arsinh}\left (c x\right ) + a} x \,d x } \]
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\[ \int x \sqrt {a+b \text {arcsinh}(c x)} \, dx=\int { \sqrt {b \operatorname {arsinh}\left (c x\right ) + a} x \,d x } \]
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Timed out. \[ \int x \sqrt {a+b \text {arcsinh}(c x)} \, dx=\int x\,\sqrt {a+b\,\mathrm {asinh}\left (c\,x\right )} \,d x \]
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