Integrand size = 11, antiderivative size = 48 \[ \int x \coth ^{-1}(\tanh (a+b x))^n \, dx=\frac {x \coth ^{-1}(\tanh (a+b x))^{1+n}}{b (1+n)}-\frac {\coth ^{-1}(\tanh (a+b x))^{2+n}}{b^2 (1+n) (2+n)} \]
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Time = 0.02 (sec) , antiderivative size = 48, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.273, Rules used = {2199, 2188, 30} \[ \int x \coth ^{-1}(\tanh (a+b x))^n \, dx=\frac {x \coth ^{-1}(\tanh (a+b x))^{n+1}}{b (n+1)}-\frac {\coth ^{-1}(\tanh (a+b x))^{n+2}}{b^2 (n+1) (n+2)} \]
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Rule 30
Rule 2188
Rule 2199
Rubi steps \begin{align*} \text {integral}& = \frac {x \coth ^{-1}(\tanh (a+b x))^{1+n}}{b (1+n)}-\frac {\int \coth ^{-1}(\tanh (a+b x))^{1+n} \, dx}{b (1+n)} \\ & = \frac {x \coth ^{-1}(\tanh (a+b x))^{1+n}}{b (1+n)}-\frac {\text {Subst}\left (\int x^{1+n} \, dx,x,\coth ^{-1}(\tanh (a+b x))\right )}{b^2 (1+n)} \\ & = \frac {x \coth ^{-1}(\tanh (a+b x))^{1+n}}{b (1+n)}-\frac {\coth ^{-1}(\tanh (a+b x))^{2+n}}{b^2 (1+n) (2+n)} \\ \end{align*}
Time = 0.04 (sec) , antiderivative size = 41, normalized size of antiderivative = 0.85 \[ \int x \coth ^{-1}(\tanh (a+b x))^n \, dx=\frac {\left (b (2+n) x-\coth ^{-1}(\tanh (a+b x))\right ) \coth ^{-1}(\tanh (a+b x))^{1+n}}{b^2 (1+n) (2+n)} \]
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Time = 9.10 (sec) , antiderivative size = 77, normalized size of antiderivative = 1.60
method | result | size |
parallelrisch | \(-\frac {\operatorname {arccoth}\left (\tanh \left (b x +a \right )\right )^{n} \operatorname {arccoth}\left (\tanh \left (b x +a \right )\right )^{2}-x \,\operatorname {arccoth}\left (\tanh \left (b x +a \right )\right ) \operatorname {arccoth}\left (\tanh \left (b x +a \right )\right )^{n} b n -2 \operatorname {arccoth}\left (\tanh \left (b x +a \right )\right )^{n} x \,\operatorname {arccoth}\left (\tanh \left (b x +a \right )\right ) b}{b^{2} \left (1+n \right ) \left (2+n \right )}\) | \(77\) |
risch | \(\frac {\left (\frac {1}{2}\right )^{n} {\left (2 \ln \left ({\mathrm e}^{b x +a}\right )-\frac {i \pi \,\operatorname {csgn}\left (i {\mathrm e}^{2 b x +2 a}\right ) {\left (-\operatorname {csgn}\left (i {\mathrm e}^{2 b x +2 a}\right )+\operatorname {csgn}\left (i {\mathrm e}^{b x +a}\right )\right )}^{2}}{2}-\frac {i \pi \,\operatorname {csgn}\left (\frac {i {\mathrm e}^{2 b x +2 a}}{{\mathrm e}^{2 b x +2 a}+1}\right ) \left (-\operatorname {csgn}\left (\frac {i {\mathrm e}^{2 b x +2 a}}{{\mathrm e}^{2 b x +2 a}+1}\right )+\operatorname {csgn}\left (i {\mathrm e}^{2 b x +2 a}\right )\right ) \left (-\operatorname {csgn}\left (\frac {i {\mathrm e}^{2 b x +2 a}}{{\mathrm e}^{2 b x +2 a}+1}\right )+\operatorname {csgn}\left (\frac {i}{{\mathrm e}^{2 b x +2 a}+1}\right )\right )}{2}-i \pi -i \pi \operatorname {csgn}\left (\frac {i}{{\mathrm e}^{2 b x +2 a}+1}\right )^{2} \left (\operatorname {csgn}\left (\frac {i}{{\mathrm e}^{2 b x +2 a}+1}\right )-1\right )\right )}^{1+n} x}{2 b \left (1+n \right )}-\frac {\left (\frac {1}{2}\right )^{n} {\left (2 \ln \left ({\mathrm e}^{b x +a}\right )-\frac {i \pi \,\operatorname {csgn}\left (i {\mathrm e}^{2 b x +2 a}\right ) {\left (-\operatorname {csgn}\left (i {\mathrm e}^{2 b x +2 a}\right )+\operatorname {csgn}\left (i {\mathrm e}^{b x +a}\right )\right )}^{2}}{2}-\frac {i \pi \,\operatorname {csgn}\left (\frac {i {\mathrm e}^{2 b x +2 a}}{{\mathrm e}^{2 b x +2 a}+1}\right ) \left (-\operatorname {csgn}\left (\frac {i {\mathrm e}^{2 b x +2 a}}{{\mathrm e}^{2 b x +2 a}+1}\right )+\operatorname {csgn}\left (i {\mathrm e}^{2 b x +2 a}\right )\right ) \left (-\operatorname {csgn}\left (\frac {i {\mathrm e}^{2 b x +2 a}}{{\mathrm e}^{2 b x +2 a}+1}\right )+\operatorname {csgn}\left (\frac {i}{{\mathrm e}^{2 b x +2 a}+1}\right )\right )}{2}-i \pi -i \pi \operatorname {csgn}\left (\frac {i}{{\mathrm e}^{2 b x +2 a}+1}\right )^{2} \left (\operatorname {csgn}\left (\frac {i}{{\mathrm e}^{2 b x +2 a}+1}\right )-1\right )\right )}^{2+n}}{4 b^{2} \left (1+n \right ) \left (2+n \right )}\) | \(480\) |
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Result contains complex when optimal does not.
Time = 0.25 (sec) , antiderivative size = 130, normalized size of antiderivative = 2.71 \[ \int x \coth ^{-1}(\tanh (a+b x))^n \, dx=\frac {{\left (4 \, a b n x + 4 \, {\left (b^{2} n + b^{2}\right )} x^{2} + \pi ^{2} + 2 i \, \pi {\left (b n x - 2 \, a\right )} - 4 \, a^{2}\right )} \cosh \left (n \log \left (\frac {1}{2} i \, \pi + b x + a\right )\right ) + {\left (4 \, a b n x + 4 \, {\left (b^{2} n + b^{2}\right )} x^{2} + \pi ^{2} + 2 i \, \pi {\left (b n x - 2 \, a\right )} - 4 \, a^{2}\right )} \sinh \left (n \log \left (\frac {1}{2} i \, \pi + b x + a\right )\right )}{4 \, {\left (b^{2} n^{2} + 3 \, b^{2} n + 2 \, b^{2}\right )}} \]
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\[ \int x \coth ^{-1}(\tanh (a+b x))^n \, dx=\begin {cases} \frac {x^{2} \operatorname {acoth}^{n}{\left (\tanh {\left (a \right )} \right )}}{2} & \text {for}\: b = 0 \\- \frac {x}{b \operatorname {acoth}{\left (\tanh {\left (a + b x \right )} \right )}} + \frac {\log {\left (\operatorname {acoth}{\left (\tanh {\left (a + b x \right )} \right )} \right )}}{b^{2}} & \text {for}\: n = -2 \\\int \frac {x}{\operatorname {acoth}{\left (\tanh {\left (a + b x \right )} \right )}}\, dx & \text {for}\: n = -1 \\\frac {b n x \operatorname {acoth}{\left (\tanh {\left (a + b x \right )} \right )} \operatorname {acoth}^{n}{\left (\tanh {\left (a + b x \right )} \right )}}{b^{2} n^{2} + 3 b^{2} n + 2 b^{2}} + \frac {2 b x \operatorname {acoth}{\left (\tanh {\left (a + b x \right )} \right )} \operatorname {acoth}^{n}{\left (\tanh {\left (a + b x \right )} \right )}}{b^{2} n^{2} + 3 b^{2} n + 2 b^{2}} - \frac {\operatorname {acoth}^{2}{\left (\tanh {\left (a + b x \right )} \right )} \operatorname {acoth}^{n}{\left (\tanh {\left (a + b x \right )} \right )}}{b^{2} n^{2} + 3 b^{2} n + 2 b^{2}} & \text {otherwise} \end {cases} \]
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Result contains complex when optimal does not.
Time = 0.44 (sec) , antiderivative size = 102, normalized size of antiderivative = 2.12 \[ \int x \coth ^{-1}(\tanh (a+b x))^n \, dx=\frac {{\left (4 \, b^{2} {\left (n + 1\right )} x^{2} + \pi ^{2} + 4 i \, \pi a - 4 \, a^{2} - 2 \, {\left (i \, \pi b n - 2 \, a b n\right )} x\right )} {\left (\cosh \left (-n \log \left (-i \, \pi + 2 \, b x + 2 \, a\right )\right ) - \sinh \left (-n \log \left (-i \, \pi + 2 \, b x + 2 \, a\right )\right )\right )}}{{\left (2^{n + 2} n^{2} + 3 \cdot 2^{n + 2} n + 2^{n + 3}\right )} b^{2}} \]
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\[ \int x \coth ^{-1}(\tanh (a+b x))^n \, dx=\int { x \operatorname {arcoth}\left (\tanh \left (b x + a\right )\right )^{n} \,d x } \]
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Time = 3.91 (sec) , antiderivative size = 205, normalized size of antiderivative = 4.27 \[ \int x \coth ^{-1}(\tanh (a+b x))^n \, dx=-{\left (\frac {\ln \left (\frac {2\,{\mathrm {e}}^{2\,a}\,{\mathrm {e}}^{2\,b\,x}}{{\mathrm {e}}^{2\,a}\,{\mathrm {e}}^{2\,b\,x}-1}\right )}{2}-\frac {\ln \left (-\frac {2}{{\mathrm {e}}^{2\,a}\,{\mathrm {e}}^{2\,b\,x}-1}\right )}{2}\right )}^n\,\left (\frac {{\left (\ln \left (-\frac {2}{{\mathrm {e}}^{2\,a}\,{\mathrm {e}}^{2\,b\,x}-1}\right )-\ln \left (\frac {2\,{\mathrm {e}}^{2\,a}\,{\mathrm {e}}^{2\,b\,x}}{{\mathrm {e}}^{2\,a}\,{\mathrm {e}}^{2\,b\,x}-1}\right )+2\,b\,x\right )}^2}{4\,b^2\,\left (n^2+3\,n+2\right )}-\frac {x^2\,\left (n+1\right )}{n^2+3\,n+2}+\frac {n\,x\,\left (\ln \left (-\frac {2}{{\mathrm {e}}^{2\,a}\,{\mathrm {e}}^{2\,b\,x}-1}\right )-\ln \left (\frac {2\,{\mathrm {e}}^{2\,a}\,{\mathrm {e}}^{2\,b\,x}}{{\mathrm {e}}^{2\,a}\,{\mathrm {e}}^{2\,b\,x}-1}\right )+2\,b\,x\right )}{2\,b\,\left (n^2+3\,n+2\right )}\right ) \]
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