Integrand size = 31, antiderivative size = 121 \[ \int \frac {c x+d x^3+e x^5+f x^7}{\sqrt {a+b x^2}} \, dx=\frac {\left (b^3 c-a b^2 d+a^2 b e-a^3 f\right ) \sqrt {a+b x^2}}{b^4}+\frac {\left (b^2 d-2 a b e+3 a^2 f\right ) \left (a+b x^2\right )^{3/2}}{3 b^4}+\frac {(b e-3 a f) \left (a+b x^2\right )^{5/2}}{5 b^4}+\frac {f \left (a+b x^2\right )^{7/2}}{7 b^4} \]
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Time = 0.10 (sec) , antiderivative size = 121, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.097, Rules used = {1825, 1813, 1864} \[ \int \frac {c x+d x^3+e x^5+f x^7}{\sqrt {a+b x^2}} \, dx=\frac {\left (a+b x^2\right )^{3/2} \left (3 a^2 f-2 a b e+b^2 d\right )}{3 b^4}+\frac {\sqrt {a+b x^2} \left (a^3 (-f)+a^2 b e-a b^2 d+b^3 c\right )}{b^4}+\frac {\left (a+b x^2\right )^{5/2} (b e-3 a f)}{5 b^4}+\frac {f \left (a+b x^2\right )^{7/2}}{7 b^4} \]
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Rule 1813
Rule 1825
Rule 1864
Rubi steps \begin{align*} \text {integral}& = \int \frac {x \left (c+d x^2+e x^4+f x^6\right )}{\sqrt {a+b x^2}} \, dx \\ & = \frac {1}{2} \text {Subst}\left (\int \frac {c+d x+e x^2+f x^3}{\sqrt {a+b x}} \, dx,x,x^2\right ) \\ & = \frac {1}{2} \text {Subst}\left (\int \left (\frac {b^3 c-a b^2 d+a^2 b e-a^3 f}{b^3 \sqrt {a+b x}}+\frac {\left (b^2 d-2 a b e+3 a^2 f\right ) \sqrt {a+b x}}{b^3}+\frac {(b e-3 a f) (a+b x)^{3/2}}{b^3}+\frac {f (a+b x)^{5/2}}{b^3}\right ) \, dx,x,x^2\right ) \\ & = \frac {\left (b^3 c-a b^2 d+a^2 b e-a^3 f\right ) \sqrt {a+b x^2}}{b^4}+\frac {\left (b^2 d-2 a b e+3 a^2 f\right ) \left (a+b x^2\right )^{3/2}}{3 b^4}+\frac {(b e-3 a f) \left (a+b x^2\right )^{5/2}}{5 b^4}+\frac {f \left (a+b x^2\right )^{7/2}}{7 b^4} \\ \end{align*}
Time = 0.02 (sec) , antiderivative size = 89, normalized size of antiderivative = 0.74 \[ \int \frac {c x+d x^3+e x^5+f x^7}{\sqrt {a+b x^2}} \, dx=\frac {\sqrt {a+b x^2} \left (-48 a^3 f+8 a^2 b \left (7 e+3 f x^2\right )-2 a b^2 \left (35 d+14 e x^2+9 f x^4\right )+b^3 \left (105 c+35 d x^2+21 e x^4+15 f x^6\right )\right )}{105 b^4} \]
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Time = 3.55 (sec) , antiderivative size = 82, normalized size of antiderivative = 0.68
method | result | size |
pseudoelliptic | \(-\frac {16 \left (\frac {\left (-5 f \,x^{6}-7 e \,x^{4}-\frac {35}{3} d \,x^{2}-35 c \right ) b^{3}}{16}+\frac {35 \left (\frac {9}{35} f \,x^{4}+\frac {2}{5} e \,x^{2}+d \right ) a \,b^{2}}{24}-\frac {7 \left (\frac {3 f \,x^{2}}{7}+e \right ) a^{2} b}{6}+f \,a^{3}\right ) \sqrt {b \,x^{2}+a}}{35 b^{4}}\) | \(82\) |
gosper | \(-\frac {\sqrt {b \,x^{2}+a}\, \left (-15 f \,x^{6} b^{3}+18 a \,b^{2} f \,x^{4}-21 b^{3} e \,x^{4}-24 a^{2} b f \,x^{2}+28 a \,b^{2} e \,x^{2}-35 b^{3} d \,x^{2}+48 f \,a^{3}-56 a^{2} b e +70 a \,b^{2} d -105 b^{3} c \right )}{105 b^{4}}\) | \(99\) |
trager | \(-\frac {\sqrt {b \,x^{2}+a}\, \left (-15 f \,x^{6} b^{3}+18 a \,b^{2} f \,x^{4}-21 b^{3} e \,x^{4}-24 a^{2} b f \,x^{2}+28 a \,b^{2} e \,x^{2}-35 b^{3} d \,x^{2}+48 f \,a^{3}-56 a^{2} b e +70 a \,b^{2} d -105 b^{3} c \right )}{105 b^{4}}\) | \(99\) |
risch | \(-\frac {\sqrt {b \,x^{2}+a}\, \left (-15 f \,x^{6} b^{3}+18 a \,b^{2} f \,x^{4}-21 b^{3} e \,x^{4}-24 a^{2} b f \,x^{2}+28 a \,b^{2} e \,x^{2}-35 b^{3} d \,x^{2}+48 f \,a^{3}-56 a^{2} b e +70 a \,b^{2} d -105 b^{3} c \right )}{105 b^{4}}\) | \(99\) |
default | \(f \left (\frac {x^{6} \sqrt {b \,x^{2}+a}}{7 b}-\frac {6 a \left (\frac {x^{4} \sqrt {b \,x^{2}+a}}{5 b}-\frac {4 a \left (\frac {x^{2} \sqrt {b \,x^{2}+a}}{3 b}-\frac {2 a \sqrt {b \,x^{2}+a}}{3 b^{2}}\right )}{5 b}\right )}{7 b}\right )+e \left (\frac {x^{4} \sqrt {b \,x^{2}+a}}{5 b}-\frac {4 a \left (\frac {x^{2} \sqrt {b \,x^{2}+a}}{3 b}-\frac {2 a \sqrt {b \,x^{2}+a}}{3 b^{2}}\right )}{5 b}\right )+d \left (\frac {x^{2} \sqrt {b \,x^{2}+a}}{3 b}-\frac {2 a \sqrt {b \,x^{2}+a}}{3 b^{2}}\right )+\frac {c \sqrt {b \,x^{2}+a}}{b}\) | \(193\) |
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Time = 0.29 (sec) , antiderivative size = 94, normalized size of antiderivative = 0.78 \[ \int \frac {c x+d x^3+e x^5+f x^7}{\sqrt {a+b x^2}} \, dx=\frac {{\left (15 \, b^{3} f x^{6} + 3 \, {\left (7 \, b^{3} e - 6 \, a b^{2} f\right )} x^{4} + 105 \, b^{3} c - 70 \, a b^{2} d + 56 \, a^{2} b e - 48 \, a^{3} f + {\left (35 \, b^{3} d - 28 \, a b^{2} e + 24 \, a^{2} b f\right )} x^{2}\right )} \sqrt {b x^{2} + a}}{105 \, b^{4}} \]
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Leaf count of result is larger than twice the leaf count of optimal. 238 vs. \(2 (112) = 224\).
Time = 0.29 (sec) , antiderivative size = 238, normalized size of antiderivative = 1.97 \[ \int \frac {c x+d x^3+e x^5+f x^7}{\sqrt {a+b x^2}} \, dx=\begin {cases} - \frac {16 a^{3} f \sqrt {a + b x^{2}}}{35 b^{4}} + \frac {8 a^{2} e \sqrt {a + b x^{2}}}{15 b^{3}} + \frac {8 a^{2} f x^{2} \sqrt {a + b x^{2}}}{35 b^{3}} - \frac {2 a d \sqrt {a + b x^{2}}}{3 b^{2}} - \frac {4 a e x^{2} \sqrt {a + b x^{2}}}{15 b^{2}} - \frac {6 a f x^{4} \sqrt {a + b x^{2}}}{35 b^{2}} + \frac {c \sqrt {a + b x^{2}}}{b} + \frac {d x^{2} \sqrt {a + b x^{2}}}{3 b} + \frac {e x^{4} \sqrt {a + b x^{2}}}{5 b} + \frac {f x^{6} \sqrt {a + b x^{2}}}{7 b} & \text {for}\: b \neq 0 \\\frac {\frac {c x^{2}}{2} + \frac {d x^{4}}{4} + \frac {e x^{6}}{6} + \frac {f x^{8}}{8}}{\sqrt {a}} & \text {otherwise} \end {cases} \]
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Time = 0.21 (sec) , antiderivative size = 180, normalized size of antiderivative = 1.49 \[ \int \frac {c x+d x^3+e x^5+f x^7}{\sqrt {a+b x^2}} \, dx=\frac {\sqrt {b x^{2} + a} f x^{6}}{7 \, b} + \frac {\sqrt {b x^{2} + a} e x^{4}}{5 \, b} - \frac {6 \, \sqrt {b x^{2} + a} a f x^{4}}{35 \, b^{2}} + \frac {\sqrt {b x^{2} + a} d x^{2}}{3 \, b} - \frac {4 \, \sqrt {b x^{2} + a} a e x^{2}}{15 \, b^{2}} + \frac {8 \, \sqrt {b x^{2} + a} a^{2} f x^{2}}{35 \, b^{3}} + \frac {\sqrt {b x^{2} + a} c}{b} - \frac {2 \, \sqrt {b x^{2} + a} a d}{3 \, b^{2}} + \frac {8 \, \sqrt {b x^{2} + a} a^{2} e}{15 \, b^{3}} - \frac {16 \, \sqrt {b x^{2} + a} a^{3} f}{35 \, b^{4}} \]
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Time = 0.28 (sec) , antiderivative size = 127, normalized size of antiderivative = 1.05 \[ \int \frac {c x+d x^3+e x^5+f x^7}{\sqrt {a+b x^2}} \, dx=\frac {{\left (b^{3} c - a b^{2} d + a^{2} b e - a^{3} f\right )} \sqrt {b x^{2} + a}}{b^{4}} + \frac {35 \, {\left (b x^{2} + a\right )}^{\frac {3}{2}} b^{2} d + 21 \, {\left (b x^{2} + a\right )}^{\frac {5}{2}} b e - 70 \, {\left (b x^{2} + a\right )}^{\frac {3}{2}} a b e + 15 \, {\left (b x^{2} + a\right )}^{\frac {7}{2}} f - 63 \, {\left (b x^{2} + a\right )}^{\frac {5}{2}} a f + 105 \, {\left (b x^{2} + a\right )}^{\frac {3}{2}} a^{2} f}{105 \, b^{4}} \]
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Time = 5.99 (sec) , antiderivative size = 103, normalized size of antiderivative = 0.85 \[ \int \frac {c x+d x^3+e x^5+f x^7}{\sqrt {a+b x^2}} \, dx=\sqrt {b\,x^2+a}\,\left (\frac {-48\,f\,a^3+56\,e\,a^2\,b-70\,d\,a\,b^2+105\,c\,b^3}{105\,b^4}+\frac {f\,x^6}{7\,b}+\frac {x^2\,\left (24\,f\,a^2\,b-28\,e\,a\,b^2+35\,d\,b^3\right )}{105\,b^4}+\frac {x^4\,\left (21\,b^3\,e-18\,a\,b^2\,f\right )}{105\,b^4}\right ) \]
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