Integrand size = 12, antiderivative size = 88 \[ \int \frac {1}{\sqrt {a+b \text {arccosh}(c x)}} \, dx=-\frac {e^{a/b} \sqrt {\pi } \text {erf}\left (\frac {\sqrt {a+b \text {arccosh}(c x)}}{\sqrt {b}}\right )}{2 \sqrt {b} c}+\frac {e^{-\frac {a}{b}} \sqrt {\pi } \text {erfi}\left (\frac {\sqrt {a+b \text {arccosh}(c x)}}{\sqrt {b}}\right )}{2 \sqrt {b} c} \]
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Time = 0.07 (sec) , antiderivative size = 88, normalized size of antiderivative = 1.00, number of steps used = 6, number of rules used = 5, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.417, Rules used = {5881, 3389, 2211, 2236, 2235} \[ \int \frac {1}{\sqrt {a+b \text {arccosh}(c x)}} \, dx=\frac {\sqrt {\pi } e^{-\frac {a}{b}} \text {erfi}\left (\frac {\sqrt {a+b \text {arccosh}(c x)}}{\sqrt {b}}\right )}{2 \sqrt {b} c}-\frac {\sqrt {\pi } e^{a/b} \text {erf}\left (\frac {\sqrt {a+b \text {arccosh}(c x)}}{\sqrt {b}}\right )}{2 \sqrt {b} c} \]
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Rule 2211
Rule 2235
Rule 2236
Rule 3389
Rule 5881
Rubi steps \begin{align*} \text {integral}& = -\frac {\text {Subst}\left (\int \frac {\sinh \left (\frac {a}{b}-\frac {x}{b}\right )}{\sqrt {x}} \, dx,x,a+b \text {arccosh}(c x)\right )}{b c} \\ & = -\frac {\text {Subst}\left (\int \frac {e^{-i \left (\frac {i a}{b}-\frac {i x}{b}\right )}}{\sqrt {x}} \, dx,x,a+b \text {arccosh}(c x)\right )}{2 b c}+\frac {\text {Subst}\left (\int \frac {e^{i \left (\frac {i a}{b}-\frac {i x}{b}\right )}}{\sqrt {x}} \, dx,x,a+b \text {arccosh}(c x)\right )}{2 b c} \\ & = -\frac {\text {Subst}\left (\int e^{\frac {a}{b}-\frac {x^2}{b}} \, dx,x,\sqrt {a+b \text {arccosh}(c x)}\right )}{b c}+\frac {\text {Subst}\left (\int e^{-\frac {a}{b}+\frac {x^2}{b}} \, dx,x,\sqrt {a+b \text {arccosh}(c x)}\right )}{b c} \\ & = -\frac {e^{a/b} \sqrt {\pi } \text {erf}\left (\frac {\sqrt {a+b \text {arccosh}(c x)}}{\sqrt {b}}\right )}{2 \sqrt {b} c}+\frac {e^{-\frac {a}{b}} \sqrt {\pi } \text {erfi}\left (\frac {\sqrt {a+b \text {arccosh}(c x)}}{\sqrt {b}}\right )}{2 \sqrt {b} c} \\ \end{align*}
Time = 0.09 (sec) , antiderivative size = 100, normalized size of antiderivative = 1.14 \[ \int \frac {1}{\sqrt {a+b \text {arccosh}(c x)}} \, dx=\frac {e^{-\frac {a}{b}} \left (e^{\frac {2 a}{b}} \sqrt {\frac {a}{b}+\text {arccosh}(c x)} \Gamma \left (\frac {1}{2},\frac {a}{b}+\text {arccosh}(c x)\right )+\sqrt {-\frac {a+b \text {arccosh}(c x)}{b}} \Gamma \left (\frac {1}{2},-\frac {a+b \text {arccosh}(c x)}{b}\right )\right )}{2 c \sqrt {a+b \text {arccosh}(c x)}} \]
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\[\int \frac {1}{\sqrt {a +b \,\operatorname {arccosh}\left (c x \right )}}d x\]
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Exception generated. \[ \int \frac {1}{\sqrt {a+b \text {arccosh}(c x)}} \, dx=\text {Exception raised: TypeError} \]
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\[ \int \frac {1}{\sqrt {a+b \text {arccosh}(c x)}} \, dx=\int \frac {1}{\sqrt {a + b \operatorname {acosh}{\left (c x \right )}}}\, dx \]
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\[ \int \frac {1}{\sqrt {a+b \text {arccosh}(c x)}} \, dx=\int { \frac {1}{\sqrt {b \operatorname {arcosh}\left (c x\right ) + a}} \,d x } \]
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\[ \int \frac {1}{\sqrt {a+b \text {arccosh}(c x)}} \, dx=\int { \frac {1}{\sqrt {b \operatorname {arcosh}\left (c x\right ) + a}} \,d x } \]
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Timed out. \[ \int \frac {1}{\sqrt {a+b \text {arccosh}(c x)}} \, dx=\int \frac {1}{\sqrt {a+b\,\mathrm {acosh}\left (c\,x\right )}} \,d x \]
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