Optimal. Leaf size=86 \[ -\frac {3 \sqrt {\pi } \text {erf}\left (\sqrt {\cosh ^{-1}(a x)}\right )}{8 a}+\frac {3 \sqrt {\pi } \text {erfi}\left (\sqrt {\cosh ^{-1}(a x)}\right )}{8 a}+x \cosh ^{-1}(a x)^{3/2}-\frac {3 \sqrt {a x-1} \sqrt {a x+1} \sqrt {\cosh ^{-1}(a x)}}{2 a} \]
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Rubi [A] time = 0.22, antiderivative size = 86, normalized size of antiderivative = 1.00, number of steps used = 8, number of rules used = 7, integrand size = 8, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.875, Rules used = {5654, 5718, 5658, 3308, 2180, 2204, 2205} \[ -\frac {3 \sqrt {\pi } \text {Erf}\left (\sqrt {\cosh ^{-1}(a x)}\right )}{8 a}+\frac {3 \sqrt {\pi } \text {Erfi}\left (\sqrt {\cosh ^{-1}(a x)}\right )}{8 a}+x \cosh ^{-1}(a x)^{3/2}-\frac {3 \sqrt {a x-1} \sqrt {a x+1} \sqrt {\cosh ^{-1}(a x)}}{2 a} \]
Antiderivative was successfully verified.
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Rule 2180
Rule 2204
Rule 2205
Rule 3308
Rule 5654
Rule 5658
Rule 5718
Rubi steps
\begin {align*} \int \cosh ^{-1}(a x)^{3/2} \, dx &=x \cosh ^{-1}(a x)^{3/2}-\frac {1}{2} (3 a) \int \frac {x \sqrt {\cosh ^{-1}(a x)}}{\sqrt {-1+a x} \sqrt {1+a x}} \, dx\\ &=-\frac {3 \sqrt {-1+a x} \sqrt {1+a x} \sqrt {\cosh ^{-1}(a x)}}{2 a}+x \cosh ^{-1}(a x)^{3/2}+\frac {3}{4} \int \frac {1}{\sqrt {\cosh ^{-1}(a x)}} \, dx\\ &=-\frac {3 \sqrt {-1+a x} \sqrt {1+a x} \sqrt {\cosh ^{-1}(a x)}}{2 a}+x \cosh ^{-1}(a x)^{3/2}+\frac {3 \operatorname {Subst}\left (\int \frac {\sinh (x)}{\sqrt {x}} \, dx,x,\cosh ^{-1}(a x)\right )}{4 a}\\ &=-\frac {3 \sqrt {-1+a x} \sqrt {1+a x} \sqrt {\cosh ^{-1}(a x)}}{2 a}+x \cosh ^{-1}(a x)^{3/2}-\frac {3 \operatorname {Subst}\left (\int \frac {e^{-x}}{\sqrt {x}} \, dx,x,\cosh ^{-1}(a x)\right )}{8 a}+\frac {3 \operatorname {Subst}\left (\int \frac {e^x}{\sqrt {x}} \, dx,x,\cosh ^{-1}(a x)\right )}{8 a}\\ &=-\frac {3 \sqrt {-1+a x} \sqrt {1+a x} \sqrt {\cosh ^{-1}(a x)}}{2 a}+x \cosh ^{-1}(a x)^{3/2}-\frac {3 \operatorname {Subst}\left (\int e^{-x^2} \, dx,x,\sqrt {\cosh ^{-1}(a x)}\right )}{4 a}+\frac {3 \operatorname {Subst}\left (\int e^{x^2} \, dx,x,\sqrt {\cosh ^{-1}(a x)}\right )}{4 a}\\ &=-\frac {3 \sqrt {-1+a x} \sqrt {1+a x} \sqrt {\cosh ^{-1}(a x)}}{2 a}+x \cosh ^{-1}(a x)^{3/2}-\frac {3 \sqrt {\pi } \text {erf}\left (\sqrt {\cosh ^{-1}(a x)}\right )}{8 a}+\frac {3 \sqrt {\pi } \text {erfi}\left (\sqrt {\cosh ^{-1}(a x)}\right )}{8 a}\\ \end {align*}
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Mathematica [A] time = 0.03, size = 45, normalized size = 0.52 \[ \frac {\frac {\sqrt {-\cosh ^{-1}(a x)} \Gamma \left (\frac {5}{2},-\cosh ^{-1}(a x)\right )}{\sqrt {\cosh ^{-1}(a x)}}+\Gamma \left (\frac {5}{2},\cosh ^{-1}(a x)\right )}{2 a} \]
Warning: Unable to verify antiderivative.
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fricas [F(-2)] time = 0.00, size = 0, normalized size = 0.00 \[ \text {Exception raised: TypeError} \]
Verification of antiderivative is not currently implemented for this CAS.
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giac [F] time = 0.00, size = 0, normalized size = 0.00 \[ \int \operatorname {arcosh}\left (a x\right )^{\frac {3}{2}}\,{d x} \]
Verification of antiderivative is not currently implemented for this CAS.
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maple [A] time = 0.20, size = 68, normalized size = 0.79 \[ -\frac {-8 \mathrm {arccosh}\left (a x \right )^{\frac {3}{2}} \sqrt {\pi }\, x a +12 \sqrt {\mathrm {arccosh}\left (a x \right )}\, \sqrt {\pi }\, \sqrt {a x +1}\, \sqrt {a x -1}+3 \pi \erf \left (\sqrt {\mathrm {arccosh}\left (a x \right )}\right )-3 \pi \erfi \left (\sqrt {\mathrm {arccosh}\left (a x \right )}\right )}{8 \sqrt {\pi }\, a} \]
Verification of antiderivative is not currently implemented for this CAS.
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maxima [F] time = 0.00, size = 0, normalized size = 0.00 \[ \int \operatorname {arcosh}\left (a x\right )^{\frac {3}{2}}\,{d x} \]
Verification of antiderivative is not currently implemented for this CAS.
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mupad [F] time = 0.00, size = -1, normalized size = -0.01 \[ \int {\mathrm {acosh}\left (a\,x\right )}^{3/2} \,d x \]
Verification of antiderivative is not currently implemented for this CAS.
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sympy [F] time = 0.00, size = 0, normalized size = 0.00 \[ \int \operatorname {acosh}^{\frac {3}{2}}{\left (a x \right )}\, dx \]
Verification of antiderivative is not currently implemented for this CAS.
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