Integrand size = 20, antiderivative size = 137 \[ \int e^{-2 \coth ^{-1}(a x)} (c-a c x)^{7/2} \, dx=-\frac {32 c^3 \sqrt {c-a c x}}{a}-\frac {16 c^2 (c-a c x)^{3/2}}{3 a}-\frac {8 c (c-a c x)^{5/2}}{5 a}-\frac {4 (c-a c x)^{7/2}}{7 a}-\frac {2 (c-a c x)^{9/2}}{9 a c}+\frac {32 \sqrt {2} c^{7/2} \text {arctanh}\left (\frac {\sqrt {c-a c x}}{\sqrt {2} \sqrt {c}}\right )}{a} \]
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Time = 0.12 (sec) , antiderivative size = 137, normalized size of antiderivative = 1.00, number of steps used = 10, number of rules used = 6, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.300, Rules used = {6302, 6265, 21, 52, 65, 212} \[ \int e^{-2 \coth ^{-1}(a x)} (c-a c x)^{7/2} \, dx=\frac {32 \sqrt {2} c^{7/2} \text {arctanh}\left (\frac {\sqrt {c-a c x}}{\sqrt {2} \sqrt {c}}\right )}{a}-\frac {32 c^3 \sqrt {c-a c x}}{a}-\frac {16 c^2 (c-a c x)^{3/2}}{3 a}-\frac {2 (c-a c x)^{9/2}}{9 a c}-\frac {4 (c-a c x)^{7/2}}{7 a}-\frac {8 c (c-a c x)^{5/2}}{5 a} \]
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Rule 21
Rule 52
Rule 65
Rule 212
Rule 6265
Rule 6302
Rubi steps \begin{align*} \text {integral}& = -\int e^{-2 \text {arctanh}(a x)} (c-a c x)^{7/2} \, dx \\ & = -\int \frac {(1-a x) (c-a c x)^{7/2}}{1+a x} \, dx \\ & = -\frac {\int \frac {(c-a c x)^{9/2}}{1+a x} \, dx}{c} \\ & = -\frac {2 (c-a c x)^{9/2}}{9 a c}-2 \int \frac {(c-a c x)^{7/2}}{1+a x} \, dx \\ & = -\frac {4 (c-a c x)^{7/2}}{7 a}-\frac {2 (c-a c x)^{9/2}}{9 a c}-(4 c) \int \frac {(c-a c x)^{5/2}}{1+a x} \, dx \\ & = -\frac {8 c (c-a c x)^{5/2}}{5 a}-\frac {4 (c-a c x)^{7/2}}{7 a}-\frac {2 (c-a c x)^{9/2}}{9 a c}-\left (8 c^2\right ) \int \frac {(c-a c x)^{3/2}}{1+a x} \, dx \\ & = -\frac {16 c^2 (c-a c x)^{3/2}}{3 a}-\frac {8 c (c-a c x)^{5/2}}{5 a}-\frac {4 (c-a c x)^{7/2}}{7 a}-\frac {2 (c-a c x)^{9/2}}{9 a c}-\left (16 c^3\right ) \int \frac {\sqrt {c-a c x}}{1+a x} \, dx \\ & = -\frac {32 c^3 \sqrt {c-a c x}}{a}-\frac {16 c^2 (c-a c x)^{3/2}}{3 a}-\frac {8 c (c-a c x)^{5/2}}{5 a}-\frac {4 (c-a c x)^{7/2}}{7 a}-\frac {2 (c-a c x)^{9/2}}{9 a c}-\left (32 c^4\right ) \int \frac {1}{(1+a x) \sqrt {c-a c x}} \, dx \\ & = -\frac {32 c^3 \sqrt {c-a c x}}{a}-\frac {16 c^2 (c-a c x)^{3/2}}{3 a}-\frac {8 c (c-a c x)^{5/2}}{5 a}-\frac {4 (c-a c x)^{7/2}}{7 a}-\frac {2 (c-a c x)^{9/2}}{9 a c}+\frac {\left (64 c^3\right ) \text {Subst}\left (\int \frac {1}{2-\frac {x^2}{c}} \, dx,x,\sqrt {c-a c x}\right )}{a} \\ & = -\frac {32 c^3 \sqrt {c-a c x}}{a}-\frac {16 c^2 (c-a c x)^{3/2}}{3 a}-\frac {8 c (c-a c x)^{5/2}}{5 a}-\frac {4 (c-a c x)^{7/2}}{7 a}-\frac {2 (c-a c x)^{9/2}}{9 a c}+\frac {32 \sqrt {2} c^{7/2} \text {arctanh}\left (\frac {\sqrt {c-a c x}}{\sqrt {2} \sqrt {c}}\right )}{a} \\ \end{align*}
Time = 0.09 (sec) , antiderivative size = 88, normalized size of antiderivative = 0.64 \[ \int e^{-2 \coth ^{-1}(a x)} (c-a c x)^{7/2} \, dx=\frac {2 c^3 \left (\sqrt {c-a c x} \left (-6257+1754 a x-732 a^2 x^2+230 a^3 x^3-35 a^4 x^4\right )+5040 \sqrt {2} \sqrt {c} \text {arctanh}\left (\frac {\sqrt {c-a c x}}{\sqrt {2} \sqrt {c}}\right )\right )}{315 a} \]
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Time = 0.57 (sec) , antiderivative size = 78, normalized size of antiderivative = 0.57
method | result | size |
pseudoelliptic | \(\frac {32 \left (\sqrt {c}\, \sqrt {2}\, \operatorname {arctanh}\left (\frac {\sqrt {-c \left (a x -1\right )}\, \sqrt {2}}{2 \sqrt {c}}\right )-\frac {\left (35 a^{4} x^{4}-230 a^{3} x^{3}+732 a^{2} x^{2}-1754 a x +6257\right ) \sqrt {-c \left (a x -1\right )}}{5040}\right ) c^{3}}{a}\) | \(78\) |
risch | \(\frac {2 \left (35 a^{4} x^{4}-230 a^{3} x^{3}+732 a^{2} x^{2}-1754 a x +6257\right ) \left (a x -1\right ) c^{4}}{315 a \sqrt {-c \left (a x -1\right )}}+\frac {32 c^{\frac {7}{2}} \operatorname {arctanh}\left (\frac {\sqrt {-a c x +c}\, \sqrt {2}}{2 \sqrt {c}}\right ) \sqrt {2}}{a}\) | \(84\) |
derivativedivides | \(-\frac {2 \left (\frac {\left (-a c x +c \right )^{\frac {9}{2}}}{9}+\frac {2 c \left (-a c x +c \right )^{\frac {7}{2}}}{7}+\frac {4 c^{2} \left (-a c x +c \right )^{\frac {5}{2}}}{5}+\frac {8 c^{3} \left (-a c x +c \right )^{\frac {3}{2}}}{3}+16 c^{4} \sqrt {-a c x +c}-16 c^{\frac {9}{2}} \sqrt {2}\, \operatorname {arctanh}\left (\frac {\sqrt {-a c x +c}\, \sqrt {2}}{2 \sqrt {c}}\right )\right )}{c a}\) | \(101\) |
default | \(\frac {-\frac {2 \left (-a c x +c \right )^{\frac {9}{2}}}{9}-\frac {4 c \left (-a c x +c \right )^{\frac {7}{2}}}{7}-\frac {8 c^{2} \left (-a c x +c \right )^{\frac {5}{2}}}{5}-\frac {16 c^{3} \left (-a c x +c \right )^{\frac {3}{2}}}{3}-32 c^{4} \sqrt {-a c x +c}+32 c^{\frac {9}{2}} \sqrt {2}\, \operatorname {arctanh}\left (\frac {\sqrt {-a c x +c}\, \sqrt {2}}{2 \sqrt {c}}\right )}{a c}\) | \(101\) |
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Time = 0.25 (sec) , antiderivative size = 204, normalized size of antiderivative = 1.49 \[ \int e^{-2 \coth ^{-1}(a x)} (c-a c x)^{7/2} \, dx=\left [\frac {2 \, {\left (2520 \, \sqrt {2} c^{\frac {7}{2}} \log \left (\frac {a c x - 2 \, \sqrt {2} \sqrt {-a c x + c} \sqrt {c} - 3 \, c}{a x + 1}\right ) - {\left (35 \, a^{4} c^{3} x^{4} - 230 \, a^{3} c^{3} x^{3} + 732 \, a^{2} c^{3} x^{2} - 1754 \, a c^{3} x + 6257 \, c^{3}\right )} \sqrt {-a c x + c}\right )}}{315 \, a}, -\frac {2 \, {\left (5040 \, \sqrt {2} \sqrt {-c} c^{3} \arctan \left (\frac {\sqrt {2} \sqrt {-a c x + c} \sqrt {-c}}{2 \, c}\right ) + {\left (35 \, a^{4} c^{3} x^{4} - 230 \, a^{3} c^{3} x^{3} + 732 \, a^{2} c^{3} x^{2} - 1754 \, a c^{3} x + 6257 \, c^{3}\right )} \sqrt {-a c x + c}\right )}}{315 \, a}\right ] \]
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Time = 2.90 (sec) , antiderivative size = 150, normalized size of antiderivative = 1.09 \[ \int e^{-2 \coth ^{-1}(a x)} (c-a c x)^{7/2} \, dx=\begin {cases} - \frac {2 \cdot \left (\frac {16 \sqrt {2} c^{5} \operatorname {atan}{\left (\frac {\sqrt {2} \sqrt {- a c x + c}}{2 \sqrt {- c}} \right )}}{\sqrt {- c}} + 16 c^{4} \sqrt {- a c x + c} + \frac {8 c^{3} \left (- a c x + c\right )^{\frac {3}{2}}}{3} + \frac {4 c^{2} \left (- a c x + c\right )^{\frac {5}{2}}}{5} + \frac {2 c \left (- a c x + c\right )^{\frac {7}{2}}}{7} + \frac {\left (- a c x + c\right )^{\frac {9}{2}}}{9}\right )}{a c} & \text {for}\: a c \neq 0 \\c^{\frac {7}{2}} \left (\begin {cases} - x & \text {for}\: a = 0 \\\frac {a x - 2 \log {\left (a x + 1 \right )} + 1}{a} & \text {otherwise} \end {cases}\right ) & \text {otherwise} \end {cases} \]
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Time = 0.30 (sec) , antiderivative size = 123, normalized size of antiderivative = 0.90 \[ \int e^{-2 \coth ^{-1}(a x)} (c-a c x)^{7/2} \, dx=-\frac {2 \, {\left (2520 \, \sqrt {2} c^{\frac {9}{2}} \log \left (-\frac {\sqrt {2} \sqrt {c} - \sqrt {-a c x + c}}{\sqrt {2} \sqrt {c} + \sqrt {-a c x + c}}\right ) + 35 \, {\left (-a c x + c\right )}^{\frac {9}{2}} + 90 \, {\left (-a c x + c\right )}^{\frac {7}{2}} c + 252 \, {\left (-a c x + c\right )}^{\frac {5}{2}} c^{2} + 840 \, {\left (-a c x + c\right )}^{\frac {3}{2}} c^{3} + 5040 \, \sqrt {-a c x + c} c^{4}\right )}}{315 \, a c} \]
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Time = 0.27 (sec) , antiderivative size = 161, normalized size of antiderivative = 1.18 \[ \int e^{-2 \coth ^{-1}(a x)} (c-a c x)^{7/2} \, dx=-\frac {32 \, \sqrt {2} c^{4} \arctan \left (\frac {\sqrt {2} \sqrt {-a c x + c}}{2 \, \sqrt {-c}}\right )}{a \sqrt {-c}} - \frac {2 \, {\left (35 \, {\left (a c x - c\right )}^{4} \sqrt {-a c x + c} a^{8} c^{8} - 90 \, {\left (a c x - c\right )}^{3} \sqrt {-a c x + c} a^{8} c^{9} + 252 \, {\left (a c x - c\right )}^{2} \sqrt {-a c x + c} a^{8} c^{10} + 840 \, {\left (-a c x + c\right )}^{\frac {3}{2}} a^{8} c^{11} + 5040 \, \sqrt {-a c x + c} a^{8} c^{12}\right )}}{315 \, a^{9} c^{9}} \]
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Time = 0.09 (sec) , antiderivative size = 112, normalized size of antiderivative = 0.82 \[ \int e^{-2 \coth ^{-1}(a x)} (c-a c x)^{7/2} \, dx=-\frac {4\,{\left (c-a\,c\,x\right )}^{7/2}}{7\,a}-\frac {8\,c\,{\left (c-a\,c\,x\right )}^{5/2}}{5\,a}-\frac {32\,c^3\,\sqrt {c-a\,c\,x}}{a}-\frac {16\,c^2\,{\left (c-a\,c\,x\right )}^{3/2}}{3\,a}-\frac {2\,{\left (c-a\,c\,x\right )}^{9/2}}{9\,a\,c}-\frac {\sqrt {2}\,c^{7/2}\,\mathrm {atan}\left (\frac {\sqrt {2}\,\sqrt {c-a\,c\,x}\,1{}\mathrm {i}}{2\,\sqrt {c}}\right )\,32{}\mathrm {i}}{a} \]
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