Integrand size = 11, antiderivative size = 34 \[ \int x (a+b x)^{2/3} \, dx=-\frac {3 a (a+b x)^{5/3}}{5 b^2}+\frac {3 (a+b x)^{8/3}}{8 b^2} \]
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Time = 0.01 (sec) , antiderivative size = 34, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 1, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.091, Rules used = {45} \[ \int x (a+b x)^{2/3} \, dx=\frac {3 (a+b x)^{8/3}}{8 b^2}-\frac {3 a (a+b x)^{5/3}}{5 b^2} \]
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Rule 45
Rubi steps \begin{align*} \text {integral}& = \int \left (-\frac {a (a+b x)^{2/3}}{b}+\frac {(a+b x)^{5/3}}{b}\right ) \, dx \\ & = -\frac {3 a (a+b x)^{5/3}}{5 b^2}+\frac {3 (a+b x)^{8/3}}{8 b^2} \\ \end{align*}
Time = 0.02 (sec) , antiderivative size = 35, normalized size of antiderivative = 1.03 \[ \int x (a+b x)^{2/3} \, dx=\frac {3 (a+b x)^{2/3} \left (-3 a^2+2 a b x+5 b^2 x^2\right )}{40 b^2} \]
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Time = 0.11 (sec) , antiderivative size = 21, normalized size of antiderivative = 0.62
method | result | size |
gosper | \(-\frac {3 \left (b x +a \right )^{\frac {5}{3}} \left (-5 b x +3 a \right )}{40 b^{2}}\) | \(21\) |
pseudoelliptic | \(-\frac {3 \left (b x +a \right )^{\frac {5}{3}} \left (-5 b x +3 a \right )}{40 b^{2}}\) | \(21\) |
derivativedivides | \(\frac {\frac {3 \left (b x +a \right )^{\frac {8}{3}}}{8}-\frac {3 a \left (b x +a \right )^{\frac {5}{3}}}{5}}{b^{2}}\) | \(26\) |
default | \(\frac {\frac {3 \left (b x +a \right )^{\frac {8}{3}}}{8}-\frac {3 a \left (b x +a \right )^{\frac {5}{3}}}{5}}{b^{2}}\) | \(26\) |
trager | \(-\frac {3 \left (-5 b^{2} x^{2}-2 a b x +3 a^{2}\right ) \left (b x +a \right )^{\frac {2}{3}}}{40 b^{2}}\) | \(32\) |
risch | \(-\frac {3 \left (-5 b^{2} x^{2}-2 a b x +3 a^{2}\right ) \left (b x +a \right )^{\frac {2}{3}}}{40 b^{2}}\) | \(32\) |
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none
Time = 0.22 (sec) , antiderivative size = 31, normalized size of antiderivative = 0.91 \[ \int x (a+b x)^{2/3} \, dx=\frac {3 \, {\left (5 \, b^{2} x^{2} + 2 \, a b x - 3 \, a^{2}\right )} {\left (b x + a\right )}^{\frac {2}{3}}}{40 \, b^{2}} \]
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Leaf count of result is larger than twice the leaf count of optimal. 202 vs. \(2 (31) = 62\).
Time = 0.82 (sec) , antiderivative size = 202, normalized size of antiderivative = 5.94 \[ \int x (a+b x)^{2/3} \, dx=- \frac {9 a^{\frac {14}{3}} \left (1 + \frac {b x}{a}\right )^{\frac {2}{3}}}{40 a^{2} b^{2} + 40 a b^{3} x} + \frac {9 a^{\frac {14}{3}}}{40 a^{2} b^{2} + 40 a b^{3} x} - \frac {3 a^{\frac {11}{3}} b x \left (1 + \frac {b x}{a}\right )^{\frac {2}{3}}}{40 a^{2} b^{2} + 40 a b^{3} x} + \frac {9 a^{\frac {11}{3}} b x}{40 a^{2} b^{2} + 40 a b^{3} x} + \frac {21 a^{\frac {8}{3}} b^{2} x^{2} \left (1 + \frac {b x}{a}\right )^{\frac {2}{3}}}{40 a^{2} b^{2} + 40 a b^{3} x} + \frac {15 a^{\frac {5}{3}} b^{3} x^{3} \left (1 + \frac {b x}{a}\right )^{\frac {2}{3}}}{40 a^{2} b^{2} + 40 a b^{3} x} \]
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none
Time = 0.21 (sec) , antiderivative size = 26, normalized size of antiderivative = 0.76 \[ \int x (a+b x)^{2/3} \, dx=\frac {3 \, {\left (b x + a\right )}^{\frac {8}{3}}}{8 \, b^{2}} - \frac {3 \, {\left (b x + a\right )}^{\frac {5}{3}} a}{5 \, b^{2}} \]
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Leaf count of result is larger than twice the leaf count of optimal. 68 vs. \(2 (26) = 52\).
Time = 0.29 (sec) , antiderivative size = 68, normalized size of antiderivative = 2.00 \[ \int x (a+b x)^{2/3} \, dx=\frac {3 \, {\left (\frac {4 \, {\left (2 \, {\left (b x + a\right )}^{\frac {5}{3}} - 5 \, {\left (b x + a\right )}^{\frac {2}{3}} a\right )} a}{b} + \frac {5 \, {\left (b x + a\right )}^{\frac {8}{3}} - 16 \, {\left (b x + a\right )}^{\frac {5}{3}} a + 20 \, {\left (b x + a\right )}^{\frac {2}{3}} a^{2}}{b}\right )}}{40 \, b} \]
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Time = 0.03 (sec) , antiderivative size = 25, normalized size of antiderivative = 0.74 \[ \int x (a+b x)^{2/3} \, dx=-\frac {24\,a\,{\left (a+b\,x\right )}^{5/3}-15\,{\left (a+b\,x\right )}^{8/3}}{40\,b^2} \]
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