Optimal. Leaf size=19 \[ \frac{2 \sinh ^{-1}\left (\frac{1}{2} \sqrt{a+b x}\right )}{b} \]
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Rubi [A] time = 0.0061986, antiderivative size = 19, normalized size of antiderivative = 1., number of steps used = 2, number of rules used = 2, integrand size = 20, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.1, Rules used = {63, 215} \[ \frac{2 \sinh ^{-1}\left (\frac{1}{2} \sqrt{a+b x}\right )}{b} \]
Antiderivative was successfully verified.
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Rule 63
Rule 215
Rubi steps
\begin{align*} \int \frac{1}{\sqrt{a+b x} \sqrt{4+a+b x}} \, dx &=\frac{2 \operatorname{Subst}\left (\int \frac{1}{\sqrt{4+x^2}} \, dx,x,\sqrt{a+b x}\right )}{b}\\ &=\frac{2 \sinh ^{-1}\left (\frac{1}{2} \sqrt{a+b x}\right )}{b}\\ \end{align*}
Mathematica [A] time = 0.0089983, size = 19, normalized size = 1. \[ \frac{2 \sinh ^{-1}\left (\frac{1}{2} \sqrt{a+b x}\right )}{b} \]
Antiderivative was successfully verified.
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Maple [B] time = 0.008, size = 86, normalized size = 4.5 \begin{align*}{\sqrt{ \left ( bx+a \right ) \left ( bx+a+4 \right ) }\ln \left ({ \left ({\frac{ab}{2}}+{\frac{b \left ( a+4 \right ) }{2}}+{b}^{2}x \right ){\frac{1}{\sqrt{{b}^{2}}}}}+\sqrt{{b}^{2}{x}^{2}+ \left ( ab+b \left ( a+4 \right ) \right ) x+a \left ( a+4 \right ) } \right ){\frac{1}{\sqrt{bx+a}}}{\frac{1}{\sqrt{bx+a+4}}}{\frac{1}{\sqrt{{b}^{2}}}}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [F(-2)] time = 0., size = 0, normalized size = 0. \begin{align*} \text{Exception raised: ValueError} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [B] time = 2.10401, size = 76, normalized size = 4. \begin{align*} -\frac{\log \left (-b x + \sqrt{b x + a + 4} \sqrt{b x + a} - a - 2\right )}{b} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [F] time = 0., size = 0, normalized size = 0. \begin{align*} \int \frac{1}{\sqrt{a + b x} \sqrt{a + b x + 4}}\, dx \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A] time = 1.24562, size = 34, normalized size = 1.79 \begin{align*} -\frac{2 \, \log \left ({\left | -\sqrt{b x + a + 4} + \sqrt{b x + a} \right |}\right )}{b} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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