Integrand size = 11, antiderivative size = 34 \[ \int x \sqrt {a+b x} \, dx=-\frac {2 a (a+b x)^{3/2}}{3 b^2}+\frac {2 (a+b x)^{5/2}}{5 b^2} \]
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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} \[ \int x \sqrt {a+b x} \, dx=\frac {2 (a+b x)^{5/2}}{5 b^2}-\frac {2 a (a+b x)^{3/2}}{3 b^2} \]
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Rule 45
Rubi steps \begin{align*} \text {integral}& = \int \left (-\frac {a \sqrt {a+b x}}{b}+\frac {(a+b x)^{3/2}}{b}\right ) \, dx \\ & = -\frac {2 a (a+b x)^{3/2}}{3 b^2}+\frac {2 (a+b x)^{5/2}}{5 b^2} \\ \end{align*}
Time = 0.00 (sec) , antiderivative size = 34, normalized size of antiderivative = 1.00 \[ \int x \sqrt {a+b x} \, dx=\frac {2 \sqrt {a+b x} \left (-2 a^2+a b x+3 b^2 x^2\right )}{15 b^2} \]
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Time = 0.08 (sec) , antiderivative size = 21, normalized size of antiderivative = 0.62
method | result | size |
gosper | \(-\frac {2 \left (b x +a \right )^{\frac {3}{2}} \left (-3 b x +2 a \right )}{15 b^{2}}\) | \(21\) |
pseudoelliptic | \(-\frac {2 \left (b x +a \right )^{\frac {3}{2}} \left (-3 b x +2 a \right )}{15 b^{2}}\) | \(21\) |
derivativedivides | \(\frac {\frac {2 \left (b x +a \right )^{\frac {5}{2}}}{5}-\frac {2 a \left (b x +a \right )^{\frac {3}{2}}}{3}}{b^{2}}\) | \(26\) |
default | \(\frac {\frac {2 \left (b x +a \right )^{\frac {5}{2}}}{5}-\frac {2 a \left (b x +a \right )^{\frac {3}{2}}}{3}}{b^{2}}\) | \(26\) |
trager | \(-\frac {2 \left (-3 b^{2} x^{2}-a b x +2 a^{2}\right ) \sqrt {b x +a}}{15 b^{2}}\) | \(32\) |
risch | \(-\frac {2 \left (-3 b^{2} x^{2}-a b x +2 a^{2}\right ) \sqrt {b x +a}}{15 b^{2}}\) | \(32\) |
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Time = 0.23 (sec) , antiderivative size = 30, normalized size of antiderivative = 0.88 \[ \int x \sqrt {a+b x} \, dx=\frac {2 \, {\left (3 \, b^{2} x^{2} + a b x - 2 \, a^{2}\right )} \sqrt {b x + a}}{15 \, b^{2}} \]
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Leaf count of result is larger than twice the leaf count of optimal. 202 vs. \(2 (31) = 62\).
Time = 0.74 (sec) , antiderivative size = 202, normalized size of antiderivative = 5.94 \[ \int x \sqrt {a+b x} \, dx=- \frac {4 a^{\frac {9}{2}} \sqrt {1 + \frac {b x}{a}}}{15 a^{2} b^{2} + 15 a b^{3} x} + \frac {4 a^{\frac {9}{2}}}{15 a^{2} b^{2} + 15 a b^{3} x} - \frac {2 a^{\frac {7}{2}} b x \sqrt {1 + \frac {b x}{a}}}{15 a^{2} b^{2} + 15 a b^{3} x} + \frac {4 a^{\frac {7}{2}} b x}{15 a^{2} b^{2} + 15 a b^{3} x} + \frac {8 a^{\frac {5}{2}} b^{2} x^{2} \sqrt {1 + \frac {b x}{a}}}{15 a^{2} b^{2} + 15 a b^{3} x} + \frac {6 a^{\frac {3}{2}} b^{3} x^{3} \sqrt {1 + \frac {b x}{a}}}{15 a^{2} b^{2} + 15 a b^{3} x} \]
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Time = 0.21 (sec) , antiderivative size = 26, normalized size of antiderivative = 0.76 \[ \int x \sqrt {a+b x} \, dx=\frac {2 \, {\left (b x + a\right )}^{\frac {5}{2}}}{5 \, b^{2}} - \frac {2 \, {\left (b x + a\right )}^{\frac {3}{2}} a}{3 \, b^{2}} \]
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Leaf count of result is larger than twice the leaf count of optimal. 66 vs. \(2 (26) = 52\).
Time = 0.28 (sec) , antiderivative size = 66, normalized size of antiderivative = 1.94 \[ \int x \sqrt {a+b x} \, dx=\frac {2 \, {\left (\frac {5 \, {\left ({\left (b x + a\right )}^{\frac {3}{2}} - 3 \, \sqrt {b x + a} a\right )} a}{b} + \frac {3 \, {\left (b x + a\right )}^{\frac {5}{2}} - 10 \, {\left (b x + a\right )}^{\frac {3}{2}} a + 15 \, \sqrt {b x + a} a^{2}}{b}\right )}}{15 \, b} \]
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Time = 0.03 (sec) , antiderivative size = 25, normalized size of antiderivative = 0.74 \[ \int x \sqrt {a+b x} \, dx=-\frac {10\,a\,{\left (a+b\,x\right )}^{3/2}-6\,{\left (a+b\,x\right )}^{5/2}}{15\,b^2} \]
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