Optimal. Leaf size=25 \[ \frac{2^x \sqrt{a-b 2^{-2 x}}}{a \log (2)} \]
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Rubi [A] time = 0.0504276, antiderivative size = 25, normalized size of antiderivative = 1., number of steps used = 2, number of rules used = 2, integrand size = 18, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.111, Rules used = {2249, 191} \[ \frac{2^x \sqrt{a-b 2^{-2 x}}}{a \log (2)} \]
Antiderivative was successfully verified.
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Rule 2249
Rule 191
Rubi steps
\begin{align*} \int \frac{2^x}{\sqrt{a-4^{-x} b}} \, dx &=\frac{\operatorname{Subst}\left (\int \frac{1}{\sqrt{a-\frac{b}{x^2}}} \, dx,x,2^x\right )}{\log (2)}\\ &=\frac{2^x \sqrt{a-2^{-2 x} b}}{a \log (2)}\\ \end{align*}
Mathematica [A] time = 0.0305713, size = 38, normalized size = 1.52 \[ \frac{2^{-x} \left (a 2^{2 x}-b\right )}{a \log (2) \sqrt{a-b 2^{-2 x}}} \]
Antiderivative was successfully verified.
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Maple [A] time = 0.024, size = 44, normalized size = 1.8 \begin{align*}{\frac{a \left ({2}^{x} \right ) ^{2}-b}{a{2}^{x}\ln \left ( 2 \right ) }{\frac{1}{\sqrt{{\frac{a \left ({2}^{x} \right ) ^{2}-b}{ \left ({2}^{x} \right ) ^{2}}}}}}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A] time = 1.64971, size = 28, normalized size = 1.12 \begin{align*} \frac{\sqrt{2^{2 \, x} a - b}}{a \log \left (2\right )} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 1.61368, size = 62, normalized size = 2.48 \begin{align*} \frac{2^{x} \sqrt{\frac{2^{2 \, x} a - b}{2^{2 \, x}}}}{a \log \left (2\right )} \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{2^{x}}{\sqrt{a - 4^{- x} b}}\, dx \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [F] time = 0., size = 0, normalized size = 0. \begin{align*} \int \frac{2^{x}}{\sqrt{a - \frac{b}{4^{x}}}}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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