Integrand size = 32, antiderivative size = 64 \[ \int \frac {-b+a x}{(b+a x) \sqrt {b^2 x+a^2 x^3}} \, dx=-\frac {\sqrt {2} \arctan \left (\frac {\sqrt {2} \sqrt {a} \sqrt {b} \sqrt {b^2 x+a^2 x^3}}{b^2+a^2 x^2}\right )}{\sqrt {a} \sqrt {b}} \]
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Time = 0.52 (sec) , antiderivative size = 91, normalized size of antiderivative = 1.42, number of steps used = 4, number of rules used = 4, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.125, Rules used = {2081, 6865, 1713, 211} \[ \int \frac {-b+a x}{(b+a x) \sqrt {b^2 x+a^2 x^3}} \, dx=-\frac {\sqrt {2} \sqrt {x} \sqrt {a^2 x^2+b^2} \arctan \left (\frac {\sqrt {2} \sqrt {a} \sqrt {b} \sqrt {x}}{\sqrt {a^2 x^2+b^2}}\right )}{\sqrt {a} \sqrt {b} \sqrt {a^2 x^3+b^2 x}} \]
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Rule 211
Rule 1713
Rule 2081
Rule 6865
Rubi steps \begin{align*} \text {integral}& = \frac {\left (\sqrt {x} \sqrt {b^2+a^2 x^2}\right ) \int \frac {-b+a x}{\sqrt {x} (b+a x) \sqrt {b^2+a^2 x^2}} \, dx}{\sqrt {b^2 x+a^2 x^3}} \\ & = \frac {\left (2 \sqrt {x} \sqrt {b^2+a^2 x^2}\right ) \text {Subst}\left (\int \frac {-b+a x^2}{\left (b+a x^2\right ) \sqrt {b^2+a^2 x^4}} \, dx,x,\sqrt {x}\right )}{\sqrt {b^2 x+a^2 x^3}} \\ & = -\frac {\left (2 b \sqrt {x} \sqrt {b^2+a^2 x^2}\right ) \text {Subst}\left (\int \frac {1}{b+2 a b^2 x^2} \, dx,x,\frac {\sqrt {x}}{\sqrt {b^2+a^2 x^2}}\right )}{\sqrt {b^2 x+a^2 x^3}} \\ & = -\frac {\sqrt {2} \sqrt {x} \sqrt {b^2+a^2 x^2} \arctan \left (\frac {\sqrt {2} \sqrt {a} \sqrt {b} \sqrt {x}}{\sqrt {b^2+a^2 x^2}}\right )}{\sqrt {a} \sqrt {b} \sqrt {b^2 x+a^2 x^3}} \\ \end{align*}
Time = 0.53 (sec) , antiderivative size = 91, normalized size of antiderivative = 1.42 \[ \int \frac {-b+a x}{(b+a x) \sqrt {b^2 x+a^2 x^3}} \, dx=-\frac {\sqrt {2} \sqrt {x} \sqrt {b^2+a^2 x^2} \arctan \left (\frac {\sqrt {2} \sqrt {a} \sqrt {b} \sqrt {x}}{\sqrt {b^2+a^2 x^2}}\right )}{\sqrt {a} \sqrt {b} \sqrt {x \left (b^2+a^2 x^2\right )}} \]
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Time = 5.00 (sec) , antiderivative size = 39, normalized size of antiderivative = 0.61
method | result | size |
default | \(\frac {\sqrt {2}\, \arctan \left (\frac {\sqrt {x \left (a^{2} x^{2}+b^{2}\right )}\, \sqrt {2}}{2 x \sqrt {a b}}\right )}{\sqrt {a b}}\) | \(39\) |
pseudoelliptic | \(\frac {\sqrt {2}\, \arctan \left (\frac {\sqrt {x \left (a^{2} x^{2}+b^{2}\right )}\, \sqrt {2}}{2 x \sqrt {a b}}\right )}{\sqrt {a b}}\) | \(39\) |
elliptic | \(\frac {i b \sqrt {-\frac {i \left (x +\frac {i b}{a}\right ) a}{b}}\, \sqrt {2}\, \sqrt {\frac {i \left (x -\frac {i b}{a}\right ) a}{b}}\, \sqrt {\frac {i a x}{b}}\, \operatorname {EllipticF}\left (\sqrt {-\frac {i \left (x +\frac {i b}{a}\right ) a}{b}}, \frac {\sqrt {2}}{2}\right )}{a \sqrt {a^{2} x^{3}+b^{2} x}}-\frac {2 i b^{2} \sqrt {-\frac {i \left (x +\frac {i b}{a}\right ) a}{b}}\, \sqrt {2}\, \sqrt {\frac {i \left (x -\frac {i b}{a}\right ) a}{b}}\, \sqrt {\frac {i a x}{b}}\, \operatorname {EllipticPi}\left (\sqrt {-\frac {i \left (x +\frac {i b}{a}\right ) a}{b}}, -\frac {i b}{a \left (-\frac {i b}{a}+\frac {b}{a}\right )}, \frac {\sqrt {2}}{2}\right )}{a^{2} \sqrt {a^{2} x^{3}+b^{2} x}\, \left (-\frac {i b}{a}+\frac {b}{a}\right )}\) | \(231\) |
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Time = 0.29 (sec) , antiderivative size = 213, normalized size of antiderivative = 3.33 \[ \int \frac {-b+a x}{(b+a x) \sqrt {b^2 x+a^2 x^3}} \, dx=\left [\frac {1}{4} \, \sqrt {2} \sqrt {-\frac {1}{a b}} \log \left (\frac {a^{4} x^{4} - 12 \, a^{3} b x^{3} + 6 \, a^{2} b^{2} x^{2} - 12 \, a b^{3} x + b^{4} + 4 \, \sqrt {2} {\left (a^{3} b x^{2} - 2 \, a^{2} b^{2} x + a b^{3}\right )} \sqrt {a^{2} x^{3} + b^{2} x} \sqrt {-\frac {1}{a b}}}{a^{4} x^{4} + 4 \, a^{3} b x^{3} + 6 \, a^{2} b^{2} x^{2} + 4 \, a b^{3} x + b^{4}}\right ), -\frac {1}{2} \, \sqrt {2} \sqrt {\frac {1}{a b}} \arctan \left (\frac {2 \, \sqrt {2} \sqrt {a^{2} x^{3} + b^{2} x} a b \sqrt {\frac {1}{a b}}}{a^{2} x^{2} - 2 \, a b x + b^{2}}\right )\right ] \]
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\[ \int \frac {-b+a x}{(b+a x) \sqrt {b^2 x+a^2 x^3}} \, dx=\int \frac {a x - b}{\sqrt {x \left (a^{2} x^{2} + b^{2}\right )} \left (a x + b\right )}\, dx \]
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\[ \int \frac {-b+a x}{(b+a x) \sqrt {b^2 x+a^2 x^3}} \, dx=\int { \frac {a x - b}{\sqrt {a^{2} x^{3} + b^{2} x} {\left (a x + b\right )}} \,d x } \]
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\[ \int \frac {-b+a x}{(b+a x) \sqrt {b^2 x+a^2 x^3}} \, dx=\int { \frac {a x - b}{\sqrt {a^{2} x^{3} + b^{2} x} {\left (a x + b\right )}} \,d x } \]
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Timed out. \[ \int \frac {-b+a x}{(b+a x) \sqrt {b^2 x+a^2 x^3}} \, dx=\text {Hanged} \]
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