Integrand size = 18, antiderivative size = 41 \[ \int (d x)^{5/2} \left (a+b \log \left (c x^n\right )\right ) \, dx=-\frac {4 b n (d x)^{7/2}}{49 d}+\frac {2 (d x)^{7/2} \left (a+b \log \left (c x^n\right )\right )}{7 d} \]
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Time = 0.01 (sec) , antiderivative size = 41, normalized size of antiderivative = 1.00, number of steps used = 1, number of rules used = 1, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.056, Rules used = {2341} \[ \int (d x)^{5/2} \left (a+b \log \left (c x^n\right )\right ) \, dx=\frac {2 (d x)^{7/2} \left (a+b \log \left (c x^n\right )\right )}{7 d}-\frac {4 b n (d x)^{7/2}}{49 d} \]
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Rule 2341
Rubi steps \begin{align*} \text {integral}& = -\frac {4 b n (d x)^{7/2}}{49 d}+\frac {2 (d x)^{7/2} \left (a+b \log \left (c x^n\right )\right )}{7 d} \\ \end{align*}
Time = 0.01 (sec) , antiderivative size = 29, normalized size of antiderivative = 0.71 \[ \int (d x)^{5/2} \left (a+b \log \left (c x^n\right )\right ) \, dx=\frac {2}{49} x (d x)^{5/2} \left (7 a-2 b n+7 b \log \left (c x^n\right )\right ) \]
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Result contains higher order function than in optimal. Order 9 vs. order 3.
Time = 0.08 (sec) , antiderivative size = 128, normalized size of antiderivative = 3.12
method | result | size |
risch | \(\frac {2 d^{3} b \,x^{4} \ln \left (x^{n}\right )}{7 \sqrt {d x}}+\frac {d^{3} \left (-7 i b \pi \,\operatorname {csgn}\left (i c \right ) \operatorname {csgn}\left (i x^{n}\right ) \operatorname {csgn}\left (i c \,x^{n}\right )+7 i b \pi \,\operatorname {csgn}\left (i c \right ) \operatorname {csgn}\left (i c \,x^{n}\right )^{2}+7 i b \pi \,\operatorname {csgn}\left (i x^{n}\right ) \operatorname {csgn}\left (i c \,x^{n}\right )^{2}-7 i b \pi \operatorname {csgn}\left (i c \,x^{n}\right )^{3}+14 b \ln \left (c \right )-4 b n +14 a \right ) x^{4}}{49 \sqrt {d x}}\) | \(128\) |
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none
Time = 0.28 (sec) , antiderivative size = 50, normalized size of antiderivative = 1.22 \[ \int (d x)^{5/2} \left (a+b \log \left (c x^n\right )\right ) \, dx=\frac {2}{49} \, {\left (7 \, b d^{2} n x^{3} \log \left (x\right ) + 7 \, b d^{2} x^{3} \log \left (c\right ) - {\left (2 \, b d^{2} n - 7 \, a d^{2}\right )} x^{3}\right )} \sqrt {d x} \]
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Time = 13.70 (sec) , antiderivative size = 48, normalized size of antiderivative = 1.17 \[ \int (d x)^{5/2} \left (a+b \log \left (c x^n\right )\right ) \, dx=\frac {2 a x \left (d x\right )^{\frac {5}{2}}}{7} - \frac {4 b n x \left (d x\right )^{\frac {5}{2}}}{49} + \frac {2 b x \left (d x\right )^{\frac {5}{2}} \log {\left (c x^{n} \right )}}{7} \]
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none
Time = 0.24 (sec) , antiderivative size = 41, normalized size of antiderivative = 1.00 \[ \int (d x)^{5/2} \left (a+b \log \left (c x^n\right )\right ) \, dx=-\frac {4 \, \left (d x\right )^{\frac {7}{2}} b n}{49 \, d} + \frac {2 \, \left (d x\right )^{\frac {7}{2}} b \log \left (c x^{n}\right )}{7 \, d} + \frac {2 \, \left (d x\right )^{\frac {7}{2}} a}{7 \, d} \]
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Result contains complex when optimal does not.
Time = 0.37 (sec) , antiderivative size = 117, normalized size of antiderivative = 2.85 \[ \int (d x)^{5/2} \left (a+b \log \left (c x^n\right )\right ) \, dx=\left (\frac {1}{7} i + \frac {1}{7}\right ) \, \sqrt {2} b d^{2} n x^{\frac {7}{2}} \sqrt {{\left | d \right |}} \cos \left (\frac {1}{4} \, \pi \mathrm {sgn}\left (d\right )\right ) \log \left (x\right ) - \left (\frac {1}{7} i - \frac {1}{7}\right ) \, \sqrt {2} b d^{2} n x^{\frac {7}{2}} \sqrt {{\left | d \right |}} \log \left (x\right ) \sin \left (\frac {1}{4} \, \pi \mathrm {sgn}\left (d\right )\right ) - \left (\frac {2}{49} i + \frac {2}{49}\right ) \, \sqrt {2} b d^{2} n x^{\frac {7}{2}} \sqrt {{\left | d \right |}} \cos \left (\frac {1}{4} \, \pi \mathrm {sgn}\left (d\right )\right ) + \left (\frac {2}{49} i - \frac {2}{49}\right ) \, \sqrt {2} b d^{2} n x^{\frac {7}{2}} \sqrt {{\left | d \right |}} \sin \left (\frac {1}{4} \, \pi \mathrm {sgn}\left (d\right )\right ) + \frac {2}{7} \, b d^{\frac {5}{2}} x^{\frac {7}{2}} \log \left (c\right ) + \frac {2}{7} \, a d^{\frac {5}{2}} x^{\frac {7}{2}} \]
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Timed out. \[ \int (d x)^{5/2} \left (a+b \log \left (c x^n\right )\right ) \, dx=\int {\left (d\,x\right )}^{5/2}\,\left (a+b\,\ln \left (c\,x^n\right )\right ) \,d x \]
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