Optimal. Leaf size=68 \[ \frac {\left (b+2 c x^2\right ) \sqrt {b x^2+c x^4}}{8 c}-\frac {b^2 \tanh ^{-1}\left (\frac {\sqrt {c} x^2}{\sqrt {b x^2+c x^4}}\right )}{8 c^{3/2}} \]
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Rubi [A]
time = 0.04, antiderivative size = 68, normalized size of antiderivative = 1.00, number of steps
used = 4, number of rules used = 4, integrand size = 17, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.235, Rules used = {2038, 626, 634,
212} \begin {gather*} \frac {\left (b+2 c x^2\right ) \sqrt {b x^2+c x^4}}{8 c}-\frac {b^2 \tanh ^{-1}\left (\frac {\sqrt {c} x^2}{\sqrt {b x^2+c x^4}}\right )}{8 c^{3/2}} \end {gather*}
Antiderivative was successfully verified.
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Rule 212
Rule 626
Rule 634
Rule 2038
Rubi steps
\begin {align*} \int x \sqrt {b x^2+c x^4} \, dx &=\frac {1}{2} \text {Subst}\left (\int \sqrt {b x+c x^2} \, dx,x,x^2\right )\\ &=\frac {\left (b+2 c x^2\right ) \sqrt {b x^2+c x^4}}{8 c}-\frac {b^2 \text {Subst}\left (\int \frac {1}{\sqrt {b x+c x^2}} \, dx,x,x^2\right )}{16 c}\\ &=\frac {\left (b+2 c x^2\right ) \sqrt {b x^2+c x^4}}{8 c}-\frac {b^2 \text {Subst}\left (\int \frac {1}{1-c x^2} \, dx,x,\frac {x^2}{\sqrt {b x^2+c x^4}}\right )}{8 c}\\ &=\frac {\left (b+2 c x^2\right ) \sqrt {b x^2+c x^4}}{8 c}-\frac {b^2 \tanh ^{-1}\left (\frac {\sqrt {c} x^2}{\sqrt {b x^2+c x^4}}\right )}{8 c^{3/2}}\\ \end {align*}
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Mathematica [A]
time = 0.06, size = 88, normalized size = 1.29 \begin {gather*} \frac {x \sqrt {b+c x^2} \left (\sqrt {c} x \sqrt {b+c x^2} \left (b+2 c x^2\right )+b^2 \log \left (-\sqrt {c} x+\sqrt {b+c x^2}\right )\right )}{8 c^{3/2} \sqrt {x^2 \left (b+c x^2\right )}} \end {gather*}
Antiderivative was successfully verified.
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Maple [A]
time = 0.08, size = 84, normalized size = 1.24
method | result | size |
risch | \(\frac {\left (2 c \,x^{2}+b \right ) \sqrt {x^{2} \left (c \,x^{2}+b \right )}}{8 c}-\frac {b^{2} \ln \left (x \sqrt {c}+\sqrt {c \,x^{2}+b}\right ) \sqrt {x^{2} \left (c \,x^{2}+b \right )}}{8 c^{\frac {3}{2}} x \sqrt {c \,x^{2}+b}}\) | \(77\) |
default | \(\frac {\sqrt {c \,x^{4}+b \,x^{2}}\, \left (2 x \left (c \,x^{2}+b \right )^{\frac {3}{2}} \sqrt {c}-\sqrt {c}\, \sqrt {c \,x^{2}+b}\, b x -\ln \left (x \sqrt {c}+\sqrt {c \,x^{2}+b}\right ) b^{2}\right )}{8 x \sqrt {c \,x^{2}+b}\, c^{\frac {3}{2}}}\) | \(84\) |
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A]
time = 0.28, size = 73, normalized size = 1.07 \begin {gather*} \frac {1}{4} \, \sqrt {c x^{4} + b x^{2}} x^{2} - \frac {b^{2} \log \left (2 \, c x^{2} + b + 2 \, \sqrt {c x^{4} + b x^{2}} \sqrt {c}\right )}{16 \, c^{\frac {3}{2}}} + \frac {\sqrt {c x^{4} + b x^{2}} b}{8 \, c} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A]
time = 0.38, size = 140, normalized size = 2.06 \begin {gather*} \left [\frac {b^{2} \sqrt {c} \log \left (-2 \, c x^{2} - b + 2 \, \sqrt {c x^{4} + b x^{2}} \sqrt {c}\right ) + 2 \, \sqrt {c x^{4} + b x^{2}} {\left (2 \, c^{2} x^{2} + b c\right )}}{16 \, c^{2}}, \frac {b^{2} \sqrt {-c} \arctan \left (\frac {\sqrt {c x^{4} + b x^{2}} \sqrt {-c}}{c x^{2} + b}\right ) + \sqrt {c x^{4} + b x^{2}} {\left (2 \, c^{2} x^{2} + b c\right )}}{8 \, c^{2}}\right ] \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \int x \sqrt {x^{2} \left (b + c x^{2}\right )}\, dx \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A]
time = 6.00, size = 69, normalized size = 1.01 \begin {gather*} \frac {1}{8} \, \sqrt {c x^{2} + b} {\left (2 \, x^{2} \mathrm {sgn}\left (x\right ) + \frac {b \mathrm {sgn}\left (x\right )}{c}\right )} x + \frac {b^{2} \log \left ({\left | -\sqrt {c} x + \sqrt {c x^{2} + b} \right |}\right ) \mathrm {sgn}\left (x\right )}{8 \, c^{\frac {3}{2}}} - \frac {b^{2} \log \left ({\left | b \right |}\right ) \mathrm {sgn}\left (x\right )}{16 \, c^{\frac {3}{2}}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [B]
time = 4.37, size = 64, normalized size = 0.94 \begin {gather*} \frac {\left (\frac {b}{4\,c}+\frac {x^2}{2}\right )\,\sqrt {c\,x^4+b\,x^2}}{2}-\frac {b^2\,\ln \left (\frac {c\,x^2+\frac {b}{2}}{\sqrt {c}}+\sqrt {c\,x^4+b\,x^2}\right )}{16\,c^{3/2}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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