Integrand size = 22, antiderivative size = 145 \[ \int \frac {x^4 \text {arccosh}(a x)}{\sqrt {1-a^2 x^2}} \, dx=-\frac {3 x^2 \sqrt {-1+a x}}{16 a^3 \sqrt {1-a x}}-\frac {x^4 \sqrt {-1+a x}}{16 a \sqrt {1-a x}}-\frac {3 x \sqrt {1-a^2 x^2} \text {arccosh}(a x)}{8 a^4}-\frac {x^3 \sqrt {1-a^2 x^2} \text {arccosh}(a x)}{4 a^2}+\frac {3 \sqrt {-1+a x} \text {arccosh}(a x)^2}{16 a^5 \sqrt {1-a x}} \]
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Time = 0.12 (sec) , antiderivative size = 145, normalized size of antiderivative = 1.00, number of steps used = 5, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.136, Rules used = {5938, 5892, 30} \[ \int \frac {x^4 \text {arccosh}(a x)}{\sqrt {1-a^2 x^2}} \, dx=\frac {3 \sqrt {a x-1} \text {arccosh}(a x)^2}{16 a^5 \sqrt {1-a x}}-\frac {3 x^2 \sqrt {a x-1}}{16 a^3 \sqrt {1-a x}}-\frac {x^3 \sqrt {1-a^2 x^2} \text {arccosh}(a x)}{4 a^2}-\frac {3 x \sqrt {1-a^2 x^2} \text {arccosh}(a x)}{8 a^4}-\frac {x^4 \sqrt {a x-1}}{16 a \sqrt {1-a x}} \]
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Rule 30
Rule 5892
Rule 5938
Rubi steps \begin{align*} \text {integral}& = -\frac {x^3 \sqrt {1-a^2 x^2} \text {arccosh}(a x)}{4 a^2}+\frac {3 \int \frac {x^2 \text {arccosh}(a x)}{\sqrt {1-a^2 x^2}} \, dx}{4 a^2}-\frac {\sqrt {-1+a x} \int x^3 \, dx}{4 a \sqrt {1-a x}} \\ & = -\frac {x^4 \sqrt {-1+a x}}{16 a \sqrt {1-a x}}-\frac {3 x \sqrt {1-a^2 x^2} \text {arccosh}(a x)}{8 a^4}-\frac {x^3 \sqrt {1-a^2 x^2} \text {arccosh}(a x)}{4 a^2}+\frac {3 \int \frac {\text {arccosh}(a x)}{\sqrt {1-a^2 x^2}} \, dx}{8 a^4}-\frac {\left (3 \sqrt {-1+a x}\right ) \int x \, dx}{8 a^3 \sqrt {1-a x}} \\ & = -\frac {3 x^2 \sqrt {-1+a x}}{16 a^3 \sqrt {1-a x}}-\frac {x^4 \sqrt {-1+a x}}{16 a \sqrt {1-a x}}-\frac {3 x \sqrt {1-a^2 x^2} \text {arccosh}(a x)}{8 a^4}-\frac {x^3 \sqrt {1-a^2 x^2} \text {arccosh}(a x)}{4 a^2}+\frac {3 \sqrt {-1+a x} \text {arccosh}(a x)^2}{16 a^5 \sqrt {1-a x}} \\ \end{align*}
Time = 0.36 (sec) , antiderivative size = 93, normalized size of antiderivative = 0.64 \[ \int \frac {x^4 \text {arccosh}(a x)}{\sqrt {1-a^2 x^2}} \, dx=\frac {\sqrt {\frac {-1+a x}{1+a x}} (1+a x) (-16 \cosh (2 \text {arccosh}(a x))-\cosh (4 \text {arccosh}(a x))+4 \text {arccosh}(a x) (6 \text {arccosh}(a x)+8 \sinh (2 \text {arccosh}(a x))+\sinh (4 \text {arccosh}(a x))))}{128 a^5 \sqrt {-((-1+a x) (1+a x))}} \]
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Leaf count of result is larger than twice the leaf count of optimal. \(455\) vs. \(2(119)=238\).
Time = 0.90 (sec) , antiderivative size = 456, normalized size of antiderivative = 3.14
method | result | size |
default | \(-\frac {3 \sqrt {-a^{2} x^{2}+1}\, \sqrt {a x -1}\, \sqrt {a x +1}\, \operatorname {arccosh}\left (a x \right )^{2}}{16 a^{5} \left (a^{2} x^{2}-1\right )}-\frac {\sqrt {-a^{2} x^{2}+1}\, \left (8 a^{5} x^{5}-12 a^{3} x^{3}+8 \sqrt {a x -1}\, \sqrt {a x +1}\, a^{4} x^{4}+4 a x -8 a^{2} x^{2} \sqrt {a x -1}\, \sqrt {a x +1}+\sqrt {a x -1}\, \sqrt {a x +1}\right ) \left (-1+4 \,\operatorname {arccosh}\left (a x \right )\right )}{256 a^{5} \left (a^{2} x^{2}-1\right )}-\frac {\sqrt {-a^{2} x^{2}+1}\, \left (2 a^{3} x^{3}-2 a x +2 a^{2} x^{2} \sqrt {a x -1}\, \sqrt {a x +1}-\sqrt {a x -1}\, \sqrt {a x +1}\right ) \left (-1+2 \,\operatorname {arccosh}\left (a x \right )\right )}{16 a^{5} \left (a^{2} x^{2}-1\right )}-\frac {\sqrt {-a^{2} x^{2}+1}\, \left (2 a^{3} x^{3}-2 a x -2 a^{2} x^{2} \sqrt {a x -1}\, \sqrt {a x +1}+\sqrt {a x -1}\, \sqrt {a x +1}\right ) \left (1+2 \,\operatorname {arccosh}\left (a x \right )\right )}{16 a^{5} \left (a^{2} x^{2}-1\right )}-\frac {\sqrt {-a^{2} x^{2}+1}\, \left (8 a^{5} x^{5}-12 a^{3} x^{3}-8 \sqrt {a x -1}\, \sqrt {a x +1}\, a^{4} x^{4}+4 a x +8 a^{2} x^{2} \sqrt {a x -1}\, \sqrt {a x +1}-\sqrt {a x -1}\, \sqrt {a x +1}\right ) \left (1+4 \,\operatorname {arccosh}\left (a x \right )\right )}{256 a^{5} \left (a^{2} x^{2}-1\right )}\) | \(456\) |
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\[ \int \frac {x^4 \text {arccosh}(a x)}{\sqrt {1-a^2 x^2}} \, dx=\int { \frac {x^{4} \operatorname {arcosh}\left (a x\right )}{\sqrt {-a^{2} x^{2} + 1}} \,d x } \]
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\[ \int \frac {x^4 \text {arccosh}(a x)}{\sqrt {1-a^2 x^2}} \, dx=\int \frac {x^{4} \operatorname {acosh}{\left (a x \right )}}{\sqrt {- \left (a x - 1\right ) \left (a x + 1\right )}}\, dx \]
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Exception generated. \[ \int \frac {x^4 \text {arccosh}(a x)}{\sqrt {1-a^2 x^2}} \, dx=\text {Exception raised: RuntimeError} \]
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\[ \int \frac {x^4 \text {arccosh}(a x)}{\sqrt {1-a^2 x^2}} \, dx=\int { \frac {x^{4} \operatorname {arcosh}\left (a x\right )}{\sqrt {-a^{2} x^{2} + 1}} \,d x } \]
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Timed out. \[ \int \frac {x^4 \text {arccosh}(a x)}{\sqrt {1-a^2 x^2}} \, dx=\int \frac {x^4\,\mathrm {acosh}\left (a\,x\right )}{\sqrt {1-a^2\,x^2}} \,d x \]
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