Integrand size = 13, antiderivative size = 38 \[ \int \frac {x^5}{\sqrt {5+x^2}} \, dx=25 \sqrt {5+x^2}-\frac {10}{3} \left (5+x^2\right )^{3/2}+\frac {1}{5} \left (5+x^2\right )^{5/2} \]
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Time = 0.01 (sec) , antiderivative size = 38, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.154, Rules used = {272, 45} \[ \int \frac {x^5}{\sqrt {5+x^2}} \, dx=\frac {1}{5} \left (x^2+5\right )^{5/2}-\frac {10}{3} \left (x^2+5\right )^{3/2}+25 \sqrt {x^2+5} \]
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Rule 45
Rule 272
Rubi steps \begin{align*} \text {integral}& = \frac {1}{2} \text {Subst}\left (\int \frac {x^2}{\sqrt {5+x}} \, dx,x,x^2\right ) \\ & = \frac {1}{2} \text {Subst}\left (\int \left (\frac {25}{\sqrt {5+x}}-10 \sqrt {5+x}+(5+x)^{3/2}\right ) \, dx,x,x^2\right ) \\ & = 25 \sqrt {5+x^2}-\frac {10}{3} \left (5+x^2\right )^{3/2}+\frac {1}{5} \left (5+x^2\right )^{5/2} \\ \end{align*}
Time = 0.01 (sec) , antiderivative size = 25, normalized size of antiderivative = 0.66 \[ \int \frac {x^5}{\sqrt {5+x^2}} \, dx=\frac {1}{15} \sqrt {5+x^2} \left (200-20 x^2+3 x^4\right ) \]
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Time = 0.04 (sec) , antiderivative size = 21, normalized size of antiderivative = 0.55
method | result | size |
trager | \(\sqrt {x^{2}+5}\, \left (\frac {1}{5} x^{4}-\frac {4}{3} x^{2}+\frac {40}{3}\right )\) | \(21\) |
gosper | \(\frac {\sqrt {x^{2}+5}\, \left (3 x^{4}-20 x^{2}+200\right )}{15}\) | \(22\) |
risch | \(\frac {\sqrt {x^{2}+5}\, \left (3 x^{4}-20 x^{2}+200\right )}{15}\) | \(22\) |
pseudoelliptic | \(\frac {\sqrt {x^{2}+5}\, \left (3 x^{4}-20 x^{2}+200\right )}{15}\) | \(22\) |
default | \(\frac {x^{4} \sqrt {x^{2}+5}}{5}-\frac {4 x^{2} \sqrt {x^{2}+5}}{3}+\frac {40 \sqrt {x^{2}+5}}{3}\) | \(35\) |
meijerg | \(\frac {25 \sqrt {5}\, \left (-\frac {16 \sqrt {\pi }}{15}+\frac {\sqrt {\pi }\, \left (\frac {6}{25} x^{4}-\frac {8}{5} x^{2}+16\right ) \sqrt {1+\frac {x^{2}}{5}}}{15}\right )}{2 \sqrt {\pi }}\) | \(41\) |
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Time = 0.24 (sec) , antiderivative size = 21, normalized size of antiderivative = 0.55 \[ \int \frac {x^5}{\sqrt {5+x^2}} \, dx=\frac {1}{15} \, {\left (3 \, x^{4} - 20 \, x^{2} + 200\right )} \sqrt {x^{2} + 5} \]
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Time = 0.21 (sec) , antiderivative size = 39, normalized size of antiderivative = 1.03 \[ \int \frac {x^5}{\sqrt {5+x^2}} \, dx=\frac {x^{4} \sqrt {x^{2} + 5}}{5} - \frac {4 x^{2} \sqrt {x^{2} + 5}}{3} + \frac {40 \sqrt {x^{2} + 5}}{3} \]
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Time = 0.26 (sec) , antiderivative size = 34, normalized size of antiderivative = 0.89 \[ \int \frac {x^5}{\sqrt {5+x^2}} \, dx=\frac {1}{5} \, \sqrt {x^{2} + 5} x^{4} - \frac {4}{3} \, \sqrt {x^{2} + 5} x^{2} + \frac {40}{3} \, \sqrt {x^{2} + 5} \]
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Time = 0.28 (sec) , antiderivative size = 28, normalized size of antiderivative = 0.74 \[ \int \frac {x^5}{\sqrt {5+x^2}} \, dx=\frac {1}{5} \, {\left (x^{2} + 5\right )}^{\frac {5}{2}} - \frac {10}{3} \, {\left (x^{2} + 5\right )}^{\frac {3}{2}} + 25 \, \sqrt {x^{2} + 5} \]
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Time = 0.03 (sec) , antiderivative size = 20, normalized size of antiderivative = 0.53 \[ \int \frac {x^5}{\sqrt {5+x^2}} \, dx=\sqrt {x^2+5}\,\left (\frac {x^4}{5}-\frac {4\,x^2}{3}+\frac {40}{3}\right ) \]
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