Optimal. Leaf size=38 \[ \frac {1}{2 b \left (b+c x^2\right )}+\frac {\log (x)}{b^2}-\frac {\log \left (b+c x^2\right )}{2 b^2} \]
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Rubi [A]
time = 0.02, antiderivative size = 38, normalized size of antiderivative = 1.00, number of steps
used = 4, number of rules used = 3, integrand size = 17, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.176, Rules used = {1598, 272, 46}
\begin {gather*} -\frac {\log \left (b+c x^2\right )}{2 b^2}+\frac {\log (x)}{b^2}+\frac {1}{2 b \left (b+c x^2\right )} \end {gather*}
Antiderivative was successfully verified.
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Rule 46
Rule 272
Rule 1598
Rubi steps
\begin {align*} \int \frac {x^3}{\left (b x^2+c x^4\right )^2} \, dx &=\int \frac {1}{x \left (b+c x^2\right )^2} \, dx\\ &=\frac {1}{2} \text {Subst}\left (\int \frac {1}{x (b+c x)^2} \, dx,x,x^2\right )\\ &=\frac {1}{2} \text {Subst}\left (\int \left (\frac {1}{b^2 x}-\frac {c}{b (b+c x)^2}-\frac {c}{b^2 (b+c x)}\right ) \, dx,x,x^2\right )\\ &=\frac {1}{2 b \left (b+c x^2\right )}+\frac {\log (x)}{b^2}-\frac {\log \left (b+c x^2\right )}{2 b^2}\\ \end {align*}
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Mathematica [A]
time = 0.01, size = 33, normalized size = 0.87 \begin {gather*} \frac {\frac {b}{b+c x^2}+2 \log (x)-\log \left (b+c x^2\right )}{2 b^2} \end {gather*}
Antiderivative was successfully verified.
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Maple [A]
time = 0.09, size = 42, normalized size = 1.11
method | result | size |
risch | \(\frac {1}{2 b \left (c \,x^{2}+b \right )}+\frac {\ln \left (x \right )}{b^{2}}-\frac {\ln \left (c \,x^{2}+b \right )}{2 b^{2}}\) | \(35\) |
norman | \(-\frac {c \,x^{2}}{2 b^{2} \left (c \,x^{2}+b \right )}+\frac {\ln \left (x \right )}{b^{2}}-\frac {\ln \left (c \,x^{2}+b \right )}{2 b^{2}}\) | \(39\) |
default | \(-\frac {c \left (-\frac {b}{c \left (c \,x^{2}+b \right )}+\frac {\ln \left (c \,x^{2}+b \right )}{c}\right )}{2 b^{2}}+\frac {\ln \left (x \right )}{b^{2}}\) | \(42\) |
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A]
time = 0.27, size = 37, normalized size = 0.97 \begin {gather*} \frac {1}{2 \, {\left (b c x^{2} + b^{2}\right )}} - \frac {\log \left (c x^{2} + b\right )}{2 \, b^{2}} + \frac {\log \left (x^{2}\right )}{2 \, b^{2}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A]
time = 0.37, size = 47, normalized size = 1.24 \begin {gather*} -\frac {{\left (c x^{2} + b\right )} \log \left (c x^{2} + b\right ) - 2 \, {\left (c x^{2} + b\right )} \log \left (x\right ) - b}{2 \, {\left (b^{2} c x^{2} + b^{3}\right )}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A]
time = 0.14, size = 34, normalized size = 0.89 \begin {gather*} \frac {1}{2 b^{2} + 2 b c x^{2}} + \frac {\log {\left (x \right )}}{b^{2}} - \frac {\log {\left (\frac {b}{c} + x^{2} \right )}}{2 b^{2}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A]
time = 6.61, size = 36, normalized size = 0.95 \begin {gather*} -\frac {\log \left ({\left | c x^{2} + b \right |}\right )}{2 \, b^{2}} + \frac {\log \left ({\left | x \right |}\right )}{b^{2}} + \frac {1}{2 \, {\left (c x^{2} + b\right )} b} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [B]
time = 4.18, size = 34, normalized size = 0.89 \begin {gather*} \frac {\ln \left (x\right )}{b^2}+\frac {1}{2\,b\,\left (c\,x^2+b\right )}-\frac {\ln \left (c\,x^2+b\right )}{2\,b^2} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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