Integrand size = 16, antiderivative size = 96 \[ \int \frac {(a-b x)^{5/2}}{\sqrt {x}} \, dx=\frac {5}{8} a^2 \sqrt {x} \sqrt {a-b x}+\frac {5}{12} a \sqrt {x} (a-b x)^{3/2}+\frac {1}{3} \sqrt {x} (a-b x)^{5/2}+\frac {5 a^3 \arctan \left (\frac {\sqrt {b} \sqrt {x}}{\sqrt {a-b x}}\right )}{8 \sqrt {b}} \]
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Time = 0.03 (sec) , antiderivative size = 96, normalized size of antiderivative = 1.00, number of steps used = 6, number of rules used = 4, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.250, Rules used = {52, 65, 223, 209} \[ \int \frac {(a-b x)^{5/2}}{\sqrt {x}} \, dx=\frac {5 a^3 \arctan \left (\frac {\sqrt {b} \sqrt {x}}{\sqrt {a-b x}}\right )}{8 \sqrt {b}}+\frac {5}{8} a^2 \sqrt {x} \sqrt {a-b x}+\frac {5}{12} a \sqrt {x} (a-b x)^{3/2}+\frac {1}{3} \sqrt {x} (a-b x)^{5/2} \]
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Rule 52
Rule 65
Rule 209
Rule 223
Rubi steps \begin{align*} \text {integral}& = \frac {1}{3} \sqrt {x} (a-b x)^{5/2}+\frac {1}{6} (5 a) \int \frac {(a-b x)^{3/2}}{\sqrt {x}} \, dx \\ & = \frac {5}{12} a \sqrt {x} (a-b x)^{3/2}+\frac {1}{3} \sqrt {x} (a-b x)^{5/2}+\frac {1}{8} \left (5 a^2\right ) \int \frac {\sqrt {a-b x}}{\sqrt {x}} \, dx \\ & = \frac {5}{8} a^2 \sqrt {x} \sqrt {a-b x}+\frac {5}{12} a \sqrt {x} (a-b x)^{3/2}+\frac {1}{3} \sqrt {x} (a-b x)^{5/2}+\frac {1}{16} \left (5 a^3\right ) \int \frac {1}{\sqrt {x} \sqrt {a-b x}} \, dx \\ & = \frac {5}{8} a^2 \sqrt {x} \sqrt {a-b x}+\frac {5}{12} a \sqrt {x} (a-b x)^{3/2}+\frac {1}{3} \sqrt {x} (a-b x)^{5/2}+\frac {1}{8} \left (5 a^3\right ) \text {Subst}\left (\int \frac {1}{\sqrt {a-b x^2}} \, dx,x,\sqrt {x}\right ) \\ & = \frac {5}{8} a^2 \sqrt {x} \sqrt {a-b x}+\frac {5}{12} a \sqrt {x} (a-b x)^{3/2}+\frac {1}{3} \sqrt {x} (a-b x)^{5/2}+\frac {1}{8} \left (5 a^3\right ) \text {Subst}\left (\int \frac {1}{1+b x^2} \, dx,x,\frac {\sqrt {x}}{\sqrt {a-b x}}\right ) \\ & = \frac {5}{8} a^2 \sqrt {x} \sqrt {a-b x}+\frac {5}{12} a \sqrt {x} (a-b x)^{3/2}+\frac {1}{3} \sqrt {x} (a-b x)^{5/2}+\frac {5 a^3 \tan ^{-1}\left (\frac {\sqrt {b} \sqrt {x}}{\sqrt {a-b x}}\right )}{8 \sqrt {b}} \\ \end{align*}
Time = 0.27 (sec) , antiderivative size = 83, normalized size of antiderivative = 0.86 \[ \int \frac {(a-b x)^{5/2}}{\sqrt {x}} \, dx=\frac {1}{24} \sqrt {x} \sqrt {a-b x} \left (33 a^2-26 a b x+8 b^2 x^2\right )+\frac {5 a^3 \arctan \left (\frac {\sqrt {b} \sqrt {x}}{-\sqrt {a}+\sqrt {a-b x}}\right )}{4 \sqrt {b}} \]
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Time = 0.08 (sec) , antiderivative size = 88, normalized size of antiderivative = 0.92
method | result | size |
risch | \(\frac {\left (8 b^{2} x^{2}-26 a b x +33 a^{2}\right ) \sqrt {x}\, \sqrt {-b x +a}}{24}+\frac {5 a^{3} \arctan \left (\frac {\sqrt {b}\, \left (x -\frac {a}{2 b}\right )}{\sqrt {-b \,x^{2}+a x}}\right ) \sqrt {x \left (-b x +a \right )}}{16 \sqrt {b}\, \sqrt {x}\, \sqrt {-b x +a}}\) | \(88\) |
default | \(\frac {\left (-b x +a \right )^{\frac {5}{2}} \sqrt {x}}{3}+\frac {5 a \left (\frac {\left (-b x +a \right )^{\frac {3}{2}} \sqrt {x}}{2}+\frac {3 a \left (\sqrt {x}\, \sqrt {-b x +a}+\frac {a \sqrt {x \left (-b x +a \right )}\, \arctan \left (\frac {\sqrt {b}\, \left (x -\frac {a}{2 b}\right )}{\sqrt {-b \,x^{2}+a x}}\right )}{2 \sqrt {-b x +a}\, \sqrt {x}\, \sqrt {b}}\right )}{4}\right )}{6}\) | \(100\) |
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Time = 0.23 (sec) , antiderivative size = 142, normalized size of antiderivative = 1.48 \[ \int \frac {(a-b x)^{5/2}}{\sqrt {x}} \, dx=\left [-\frac {15 \, a^{3} \sqrt {-b} \log \left (-2 \, b x + 2 \, \sqrt {-b x + a} \sqrt {-b} \sqrt {x} + a\right ) - 2 \, {\left (8 \, b^{3} x^{2} - 26 \, a b^{2} x + 33 \, a^{2} b\right )} \sqrt {-b x + a} \sqrt {x}}{48 \, b}, -\frac {15 \, a^{3} \sqrt {b} \arctan \left (\frac {\sqrt {-b x + a}}{\sqrt {b} \sqrt {x}}\right ) - {\left (8 \, b^{3} x^{2} - 26 \, a b^{2} x + 33 \, a^{2} b\right )} \sqrt {-b x + a} \sqrt {x}}{24 \, b}\right ] \]
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Result contains complex when optimal does not.
Time = 6.53 (sec) , antiderivative size = 246, normalized size of antiderivative = 2.56 \[ \int \frac {(a-b x)^{5/2}}{\sqrt {x}} \, dx=\begin {cases} - \frac {11 i a^{\frac {5}{2}} \sqrt {x}}{8 \sqrt {-1 + \frac {b x}{a}}} + \frac {59 i a^{\frac {3}{2}} b x^{\frac {3}{2}}}{24 \sqrt {-1 + \frac {b x}{a}}} - \frac {17 i \sqrt {a} b^{2} x^{\frac {5}{2}}}{12 \sqrt {-1 + \frac {b x}{a}}} - \frac {5 i a^{3} \operatorname {acosh}{\left (\frac {\sqrt {b} \sqrt {x}}{\sqrt {a}} \right )}}{8 \sqrt {b}} + \frac {i b^{3} x^{\frac {7}{2}}}{3 \sqrt {a} \sqrt {-1 + \frac {b x}{a}}} & \text {for}\: \left |{\frac {b x}{a}}\right | > 1 \\\frac {11 a^{\frac {5}{2}} \sqrt {x} \sqrt {1 - \frac {b x}{a}}}{8} - \frac {13 a^{\frac {3}{2}} b x^{\frac {3}{2}} \sqrt {1 - \frac {b x}{a}}}{12} + \frac {\sqrt {a} b^{2} x^{\frac {5}{2}} \sqrt {1 - \frac {b x}{a}}}{3} + \frac {5 a^{3} \operatorname {asin}{\left (\frac {\sqrt {b} \sqrt {x}}{\sqrt {a}} \right )}}{8 \sqrt {b}} & \text {otherwise} \end {cases} \]
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Time = 0.29 (sec) , antiderivative size = 130, normalized size of antiderivative = 1.35 \[ \int \frac {(a-b x)^{5/2}}{\sqrt {x}} \, dx=-\frac {5 \, a^{3} \arctan \left (\frac {\sqrt {-b x + a}}{\sqrt {b} \sqrt {x}}\right )}{8 \, \sqrt {b}} + \frac {\frac {15 \, \sqrt {-b x + a} a^{3} b^{2}}{\sqrt {x}} + \frac {40 \, {\left (-b x + a\right )}^{\frac {3}{2}} a^{3} b}{x^{\frac {3}{2}}} + \frac {33 \, {\left (-b x + a\right )}^{\frac {5}{2}} a^{3}}{x^{\frac {5}{2}}}}{24 \, {\left (b^{3} - \frac {3 \, {\left (b x - a\right )} b^{2}}{x} + \frac {3 \, {\left (b x - a\right )}^{2} b}{x^{2}} - \frac {{\left (b x - a\right )}^{3}}{x^{3}}\right )}} \]
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Time = 77.45 (sec) , antiderivative size = 112, normalized size of antiderivative = 1.17 \[ \int \frac {(a-b x)^{5/2}}{\sqrt {x}} \, dx=\frac {{\left (\frac {15 \, a^{3} \log \left ({\left | -\sqrt {-b x + a} \sqrt {-b} + \sqrt {{\left (b x - a\right )} b + a b} \right |}\right )}{\sqrt {-b}} + \sqrt {{\left (b x - a\right )} b + a b} \sqrt {-b x + a} {\left (2 \, {\left (b x - a\right )} {\left (\frac {4 \, {\left (b x - a\right )}}{b} - \frac {5 \, a}{b}\right )} + \frac {15 \, a^{2}}{b}\right )}\right )} b}{24 \, {\left | b \right |}} \]
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Timed out. \[ \int \frac {(a-b x)^{5/2}}{\sqrt {x}} \, dx=\int \frac {{\left (a-b\,x\right )}^{5/2}}{\sqrt {x}} \,d x \]
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