Integrand size = 25, antiderivative size = 82 \[ \int e^{\coth ^{-1}(a x)} x^m \sqrt {c-a^2 c x^2} \, dx=\frac {x^m \sqrt {c-a^2 c x^2}}{a (1+m) \sqrt {1-\frac {1}{a^2 x^2}}}+\frac {x^{1+m} \sqrt {c-a^2 c x^2}}{(2+m) \sqrt {1-\frac {1}{a^2 x^2}}} \]
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Time = 0.17 (sec) , antiderivative size = 82, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.120, Rules used = {6327, 6328, 45} \[ \int e^{\coth ^{-1}(a x)} x^m \sqrt {c-a^2 c x^2} \, dx=\frac {x^{m+1} \sqrt {c-a^2 c x^2}}{(m+2) \sqrt {1-\frac {1}{a^2 x^2}}}+\frac {x^m \sqrt {c-a^2 c x^2}}{a (m+1) \sqrt {1-\frac {1}{a^2 x^2}}} \]
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Rule 45
Rule 6327
Rule 6328
Rubi steps \begin{align*} \text {integral}& = \frac {\sqrt {c-a^2 c x^2} \int e^{\coth ^{-1}(a x)} \sqrt {1-\frac {1}{a^2 x^2}} x^{1+m} \, dx}{\sqrt {1-\frac {1}{a^2 x^2}} x} \\ & = \frac {\sqrt {c-a^2 c x^2} \int x^m (1+a x) \, dx}{a \sqrt {1-\frac {1}{a^2 x^2}} x} \\ & = \frac {\sqrt {c-a^2 c x^2} \int \left (x^m+a x^{1+m}\right ) \, dx}{a \sqrt {1-\frac {1}{a^2 x^2}} x} \\ & = \frac {x^m \sqrt {c-a^2 c x^2}}{a (1+m) \sqrt {1-\frac {1}{a^2 x^2}}}+\frac {x^{1+m} \sqrt {c-a^2 c x^2}}{(2+m) \sqrt {1-\frac {1}{a^2 x^2}}} \\ \end{align*}
Time = 0.05 (sec) , antiderivative size = 56, normalized size of antiderivative = 0.68 \[ \int e^{\coth ^{-1}(a x)} x^m \sqrt {c-a^2 c x^2} \, dx=\frac {x^m (2+m+a x+a m x) \sqrt {c-a^2 c x^2}}{a (1+m) (2+m) \sqrt {1-\frac {1}{a^2 x^2}}} \]
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Time = 0.61 (sec) , antiderivative size = 62, normalized size of antiderivative = 0.76
method | result | size |
gosper | \(\frac {x^{1+m} \sqrt {-a^{2} c \,x^{2}+c}\, \left (a m x +a x +m +2\right )}{\left (1+m \right ) \left (2+m \right ) \left (a x +1\right ) \sqrt {\frac {a x -1}{a x +1}}}\) | \(62\) |
risch | \(-\frac {\sqrt {-\frac {c \left (a^{2} x^{2}-1\right )}{\left (a x -1\right ) \left (a x +1\right )}}\, \left (a x -1\right ) c \left (a m x +a x +m +2\right ) x \,x^{m}}{\sqrt {\frac {a x -1}{a x +1}}\, \sqrt {-c \left (a^{2} x^{2}-1\right )}\, \sqrt {-c}\, \left (2+m \right ) \left (1+m \right )}\) | \(95\) |
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Time = 0.26 (sec) , antiderivative size = 74, normalized size of antiderivative = 0.90 \[ \int e^{\coth ^{-1}(a x)} x^m \sqrt {c-a^2 c x^2} \, dx=-\frac {\sqrt {-a^{2} c x^{2} + c} {\left ({\left (a m + a\right )} x^{2} + {\left (m + 2\right )} x\right )} x^{m} \sqrt {\frac {a x - 1}{a x + 1}}}{m^{2} - {\left (a m^{2} + 3 \, a m + 2 \, a\right )} x + 3 \, m + 2} \]
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\[ \int e^{\coth ^{-1}(a x)} x^m \sqrt {c-a^2 c x^2} \, dx=\int \frac {x^{m} \sqrt {- c \left (a x - 1\right ) \left (a x + 1\right )}}{\sqrt {\frac {a x - 1}{a x + 1}}}\, dx \]
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Time = 0.23 (sec) , antiderivative size = 54, normalized size of antiderivative = 0.66 \[ \int e^{\coth ^{-1}(a x)} x^m \sqrt {c-a^2 c x^2} \, dx=\frac {{\left (a \sqrt {-c} {\left (m + 1\right )} x^{2} + \sqrt {-c} {\left (m + 2\right )} x\right )} {\left (a x + 1\right )} x^{m}}{{\left (m^{2} + 3 \, m + 2\right )} a x + m^{2} + 3 \, m + 2} \]
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\[ \int e^{\coth ^{-1}(a x)} x^m \sqrt {c-a^2 c x^2} \, dx=\int { \frac {\sqrt {-a^{2} c x^{2} + c} x^{m}}{\sqrt {\frac {a x - 1}{a x + 1}}} \,d x } \]
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Time = 4.24 (sec) , antiderivative size = 93, normalized size of antiderivative = 1.13 \[ \int e^{\coth ^{-1}(a x)} x^m \sqrt {c-a^2 c x^2} \, dx=\frac {\sqrt {\frac {a\,x-1}{a\,x+1}}\,\left (\frac {x^m\,x^2\,\sqrt {c-a^2\,c\,x^2}\,\left (m+1\right )}{m^2+3\,m+2}+\frac {x\,x^m\,\sqrt {c-a^2\,c\,x^2}\,\left (m+2\right )}{a\,\left (m^2+3\,m+2\right )}\right )}{x-\frac {1}{a}} \]
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