Integrand size = 11, antiderivative size = 17 \[ \int \frac {x^2}{(a+b x)^4} \, dx=\frac {x^3}{3 a (a+b x)^3} \]
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Time = 0.00 (sec) , antiderivative size = 17, normalized size of antiderivative = 1.00, number of steps used = 1, number of rules used = 1, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.091, Rules used = {37} \[ \int \frac {x^2}{(a+b x)^4} \, dx=\frac {x^3}{3 a (a+b x)^3} \]
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Rule 37
Rubi steps \begin{align*} \text {integral}& = \frac {x^3}{3 a (a+b x)^3} \\ \end{align*}
Time = 0.01 (sec) , antiderivative size = 31, normalized size of antiderivative = 1.82 \[ \int \frac {x^2}{(a+b x)^4} \, dx=-\frac {a^2+3 a b x+3 b^2 x^2}{3 b^3 (a+b x)^3} \]
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Time = 0.18 (sec) , antiderivative size = 30, normalized size of antiderivative = 1.76
method | result | size |
gosper | \(-\frac {3 b^{2} x^{2}+3 a b x +a^{2}}{3 b^{3} \left (b x +a \right )^{3}}\) | \(30\) |
parallelrisch | \(\frac {-3 b^{2} x^{2}-3 a b x -a^{2}}{3 b^{3} \left (b x +a \right )^{3}}\) | \(32\) |
norman | \(\frac {-\frac {x^{2}}{b}-\frac {a x}{b^{2}}-\frac {a^{2}}{3 b^{3}}}{\left (b x +a \right )^{3}}\) | \(33\) |
risch | \(\frac {-\frac {x^{2}}{b}-\frac {a x}{b^{2}}-\frac {a^{2}}{3 b^{3}}}{\left (b x +a \right )^{3}}\) | \(33\) |
default | \(-\frac {a^{2}}{3 b^{3} \left (b x +a \right )^{3}}+\frac {a}{b^{3} \left (b x +a \right )^{2}}-\frac {1}{\left (b x +a \right ) b^{3}}\) | \(41\) |
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Leaf count of result is larger than twice the leaf count of optimal. 54 vs. \(2 (15) = 30\).
Time = 0.22 (sec) , antiderivative size = 54, normalized size of antiderivative = 3.18 \[ \int \frac {x^2}{(a+b x)^4} \, dx=-\frac {3 \, b^{2} x^{2} + 3 \, a b x + a^{2}}{3 \, {\left (b^{6} x^{3} + 3 \, a b^{5} x^{2} + 3 \, a^{2} b^{4} x + a^{3} b^{3}\right )}} \]
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Leaf count of result is larger than twice the leaf count of optimal. 56 vs. \(2 (12) = 24\).
Time = 0.13 (sec) , antiderivative size = 56, normalized size of antiderivative = 3.29 \[ \int \frac {x^2}{(a+b x)^4} \, dx=\frac {- a^{2} - 3 a b x - 3 b^{2} x^{2}}{3 a^{3} b^{3} + 9 a^{2} b^{4} x + 9 a b^{5} x^{2} + 3 b^{6} x^{3}} \]
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Leaf count of result is larger than twice the leaf count of optimal. 54 vs. \(2 (15) = 30\).
Time = 0.25 (sec) , antiderivative size = 54, normalized size of antiderivative = 3.18 \[ \int \frac {x^2}{(a+b x)^4} \, dx=-\frac {3 \, b^{2} x^{2} + 3 \, a b x + a^{2}}{3 \, {\left (b^{6} x^{3} + 3 \, a b^{5} x^{2} + 3 \, a^{2} b^{4} x + a^{3} b^{3}\right )}} \]
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none
Time = 0.30 (sec) , antiderivative size = 29, normalized size of antiderivative = 1.71 \[ \int \frac {x^2}{(a+b x)^4} \, dx=-\frac {3 \, b^{2} x^{2} + 3 \, a b x + a^{2}}{3 \, {\left (b x + a\right )}^{3} b^{3}} \]
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Time = 0.09 (sec) , antiderivative size = 56, normalized size of antiderivative = 3.29 \[ \int \frac {x^2}{(a+b x)^4} \, dx=-\frac {a^2+3\,a\,b\,x+3\,b^2\,x^2}{3\,a^3\,b^3+9\,a^2\,b^4\,x+9\,a\,b^5\,x^2+3\,b^6\,x^3} \]
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