Optimal. Leaf size=38 \[ \frac{2 \tan ^{-1}\left (\frac{\sqrt{b} x}{\sqrt{a x^n-b x^2}}\right )}{\sqrt{b} (2-n)} \]
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Rubi [A] time = 0.0209641, antiderivative size = 38, normalized size of antiderivative = 1., number of steps used = 3, number of rules used = 3, integrand size = 20, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.15, Rules used = {1979, 2008, 203} \[ \frac{2 \tan ^{-1}\left (\frac{\sqrt{b} x}{\sqrt{a x^n-b x^2}}\right )}{\sqrt{b} (2-n)} \]
Antiderivative was successfully verified.
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Rule 1979
Rule 2008
Rule 203
Rubi steps
\begin{align*} \int \frac{1}{\sqrt{x^n \left (a-b x^{2-n}\right )}} \, dx &=\int \frac{1}{\sqrt{-b x^2+a x^n}} \, dx\\ &=\frac{2 \operatorname{Subst}\left (\int \frac{1}{1+b x^2} \, dx,x,\frac{x}{\sqrt{-b x^2+a x^n}}\right )}{2-n}\\ &=\frac{2 \tan ^{-1}\left (\frac{\sqrt{b} x}{\sqrt{-b x^2+a x^n}}\right )}{\sqrt{b} (2-n)}\\ \end{align*}
Mathematica [B] time = 0.0795574, size = 80, normalized size = 2.11 \[ -\frac{2 \sqrt{a} x^{n/2} \sqrt{1-\frac{b x^{2-n}}{a}} \sin ^{-1}\left (\frac{\sqrt{b} x^{1-\frac{n}{2}}}{\sqrt{a}}\right )}{\sqrt{b} (n-2) \sqrt{a x^n-b x^2}} \]
Antiderivative was successfully verified.
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Maple [F] time = 0.346, size = 0, normalized size = 0. \begin{align*} \int{\frac{1}{\sqrt{{x}^{n} \left ( a-b{x}^{2-n} \right ) }}}\, dx \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [F] time = 0., size = 0, normalized size = 0. \begin{align*} \int \frac{1}{\sqrt{-{\left (b x^{-n + 2} - a\right )} x^{n}}}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [F(-2)] time = 0., size = 0, normalized size = 0. \begin{align*} \text{Exception raised: UnboundLocalError} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [F(-1)] time = 0., size = 0, normalized size = 0. \begin{align*} \text{Timed out} \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{1}{\sqrt{-{\left (b x^{-n + 2} - a\right )} x^{n}}}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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