Integrand size = 19, antiderivative size = 50 \[ \int \frac {\sqrt {b x^2+c x^4}}{x^2} \, dx=\frac {\sqrt {b x^2+c x^4}}{x}-\sqrt {b} \text {arctanh}\left (\frac {\sqrt {b} x}{\sqrt {b x^2+c x^4}}\right ) \]
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Time = 0.04 (sec) , antiderivative size = 50, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.158, Rules used = {2046, 2033, 212} \[ \int \frac {\sqrt {b x^2+c x^4}}{x^2} \, dx=\frac {\sqrt {b x^2+c x^4}}{x}-\sqrt {b} \text {arctanh}\left (\frac {\sqrt {b} x}{\sqrt {b x^2+c x^4}}\right ) \]
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Rule 212
Rule 2033
Rule 2046
Rubi steps \begin{align*} \text {integral}& = \frac {\sqrt {b x^2+c x^4}}{x}+b \int \frac {1}{\sqrt {b x^2+c x^4}} \, dx \\ & = \frac {\sqrt {b x^2+c x^4}}{x}-b \text {Subst}\left (\int \frac {1}{1-b x^2} \, dx,x,\frac {x}{\sqrt {b x^2+c x^4}}\right ) \\ & = \frac {\sqrt {b x^2+c x^4}}{x}-\sqrt {b} \tanh ^{-1}\left (\frac {\sqrt {b} x}{\sqrt {b x^2+c x^4}}\right ) \\ \end{align*}
Time = 0.05 (sec) , antiderivative size = 60, normalized size of antiderivative = 1.20 \[ \int \frac {\sqrt {b x^2+c x^4}}{x^2} \, dx=\frac {x \left (b+c x^2-\sqrt {b} \sqrt {b+c x^2} \text {arctanh}\left (\frac {\sqrt {b+c x^2}}{\sqrt {b}}\right )\right )}{\sqrt {x^2 \left (b+c x^2\right )}} \]
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Time = 0.21 (sec) , antiderivative size = 63, normalized size of antiderivative = 1.26
method | result | size |
default | \(\frac {\sqrt {c \,x^{4}+b \,x^{2}}\, \left (\sqrt {c \,x^{2}+b}-\sqrt {b}\, \ln \left (\frac {2 b +2 \sqrt {b}\, \sqrt {c \,x^{2}+b}}{x}\right )\right )}{x \sqrt {c \,x^{2}+b}}\) | \(63\) |
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Time = 0.28 (sec) , antiderivative size = 117, normalized size of antiderivative = 2.34 \[ \int \frac {\sqrt {b x^2+c x^4}}{x^2} \, dx=\left [\frac {\sqrt {b} x \log \left (-\frac {c x^{3} + 2 \, b x - 2 \, \sqrt {c x^{4} + b x^{2}} \sqrt {b}}{x^{3}}\right ) + 2 \, \sqrt {c x^{4} + b x^{2}}}{2 \, x}, \frac {\sqrt {-b} x \arctan \left (\frac {\sqrt {c x^{4} + b x^{2}} \sqrt {-b}}{c x^{3} + b x}\right ) + \sqrt {c x^{4} + b x^{2}}}{x}\right ] \]
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\[ \int \frac {\sqrt {b x^2+c x^4}}{x^2} \, dx=\int \frac {\sqrt {x^{2} \left (b + c x^{2}\right )}}{x^{2}}\, dx \]
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\[ \int \frac {\sqrt {b x^2+c x^4}}{x^2} \, dx=\int { \frac {\sqrt {c x^{4} + b x^{2}}}{x^{2}} \,d x } \]
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none
Time = 0.27 (sec) , antiderivative size = 69, normalized size of antiderivative = 1.38 \[ \int \frac {\sqrt {b x^2+c x^4}}{x^2} \, dx=\frac {b \arctan \left (\frac {\sqrt {c x^{2} + b}}{\sqrt {-b}}\right ) \mathrm {sgn}\left (x\right )}{\sqrt {-b}} + \sqrt {c x^{2} + b} \mathrm {sgn}\left (x\right ) - \frac {{\left (b \arctan \left (\frac {\sqrt {b}}{\sqrt {-b}}\right ) + \sqrt {-b} \sqrt {b}\right )} \mathrm {sgn}\left (x\right )}{\sqrt {-b}} \]
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Time = 13.03 (sec) , antiderivative size = 68, normalized size of antiderivative = 1.36 \[ \int \frac {\sqrt {b x^2+c x^4}}{x^2} \, dx=\frac {\sqrt {c\,x^4+b\,x^2}}{x}+\frac {\sqrt {b}\,\mathrm {asin}\left (\frac {\sqrt {b}\,1{}\mathrm {i}}{\sqrt {c}\,x}\right )\,\sqrt {c\,x^4+b\,x^2}\,1{}\mathrm {i}}{\sqrt {c}\,x^2\,\sqrt {\frac {b}{c\,x^2}+1}} \]
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