Optimal. Leaf size=46 \[ \frac {1}{2} x \sqrt {a+b x^2}+\frac {a \tanh ^{-1}\left (\frac {\sqrt {b} x}{\sqrt {a+b x^2}}\right )}{2 \sqrt {b}} \]
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Rubi [A] time = 0.01, antiderivative size = 46, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 3, integrand size = 11, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.273, Rules used = {195, 217, 206} \[ \frac {1}{2} x \sqrt {a+b x^2}+\frac {a \tanh ^{-1}\left (\frac {\sqrt {b} x}{\sqrt {a+b x^2}}\right )}{2 \sqrt {b}} \]
Antiderivative was successfully verified.
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Rule 195
Rule 206
Rule 217
Rubi steps
\begin {align*} \int \sqrt {a+b x^2} \, dx &=\frac {1}{2} x \sqrt {a+b x^2}+\frac {1}{2} a \int \frac {1}{\sqrt {a+b x^2}} \, dx\\ &=\frac {1}{2} x \sqrt {a+b x^2}+\frac {1}{2} a \operatorname {Subst}\left (\int \frac {1}{1-b x^2} \, dx,x,\frac {x}{\sqrt {a+b x^2}}\right )\\ &=\frac {1}{2} x \sqrt {a+b x^2}+\frac {a \tanh ^{-1}\left (\frac {\sqrt {b} x}{\sqrt {a+b x^2}}\right )}{2 \sqrt {b}}\\ \end {align*}
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Mathematica [A] time = 0.02, size = 49, normalized size = 1.07 \[ \frac {1}{2} x \sqrt {a+b x^2}+\frac {a \log \left (\sqrt {b} \sqrt {a+b x^2}+b x\right )}{2 \sqrt {b}} \]
Antiderivative was successfully verified.
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fricas [A] time = 0.55, size = 94, normalized size = 2.04 \[ \left [\frac {2 \, \sqrt {b x^{2} + a} b x + a \sqrt {b} \log \left (-2 \, b x^{2} - 2 \, \sqrt {b x^{2} + a} \sqrt {b} x - a\right )}{4 \, b}, \frac {\sqrt {b x^{2} + a} b x - a \sqrt {-b} \arctan \left (\frac {\sqrt {-b} x}{\sqrt {b x^{2} + a}}\right )}{2 \, b}\right ] \]
Verification of antiderivative is not currently implemented for this CAS.
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giac [A] time = 0.58, size = 37, normalized size = 0.80 \[ \frac {1}{2} \, \sqrt {b x^{2} + a} x - \frac {a \log \left ({\left | -\sqrt {b} x + \sqrt {b x^{2} + a} \right |}\right )}{2 \, \sqrt {b}} \]
Verification of antiderivative is not currently implemented for this CAS.
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maple [A] time = 0.00, size = 36, normalized size = 0.78 \[ \frac {a \ln \left (\sqrt {b}\, x +\sqrt {b \,x^{2}+a}\right )}{2 \sqrt {b}}+\frac {\sqrt {b \,x^{2}+a}\, x}{2} \]
Verification of antiderivative is not currently implemented for this CAS.
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maxima [A] time = 1.36, size = 28, normalized size = 0.61 \[ \frac {1}{2} \, \sqrt {b x^{2} + a} x + \frac {a \operatorname {arsinh}\left (\frac {b x}{\sqrt {a b}}\right )}{2 \, \sqrt {b}} \]
Verification of antiderivative is not currently implemented for this CAS.
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mupad [B] time = 4.71, size = 35, normalized size = 0.76 \[ \frac {x\,\sqrt {b\,x^2+a}}{2}+\frac {a\,\ln \left (\sqrt {b}\,x+\sqrt {b\,x^2+a}\right )}{2\,\sqrt {b}} \]
Verification of antiderivative is not currently implemented for this CAS.
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sympy [A] time = 1.86, size = 41, normalized size = 0.89 \[ \frac {\sqrt {a} x \sqrt {1 + \frac {b x^{2}}{a}}}{2} + \frac {a \operatorname {asinh}{\left (\frac {\sqrt {b} x}{\sqrt {a}} \right )}}{2 \sqrt {b}} \]
Verification of antiderivative is not currently implemented for this CAS.
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