3.2.67 \(\int \frac {1+x^2}{(-1+x^2) \sqrt {-x+x^3}} \, dx\) [167]

Optimal. Leaf size=20 \[ -\frac {2 \sqrt {-x+x^3}}{-1+x^2} \]

[Out]

-2*(x^3-x)^(1/2)/(x^2-1)

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Rubi [A]
time = 0.05, antiderivative size = 14, normalized size of antiderivative = 0.70, number of steps used = 2, number of rules used = 2, integrand size = 24, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.083, Rules used = {2081, 460} \begin {gather*} -\frac {2 x}{\sqrt {x^3-x}} \end {gather*}

Antiderivative was successfully verified.

[In]

Int[(1 + x^2)/((-1 + x^2)*Sqrt[-x + x^3]),x]

[Out]

(-2*x)/Sqrt[-x + x^3]

Rule 460

Int[((e_.)*(x_))^(m_.)*((a_) + (b_.)*(x_)^(n_))^(p_.)*((c_) + (d_.)*(x_)^(n_)), x_Symbol] :> Simp[c*(e*x)^(m +
1)*((a + b*x^n)^(p + 1)/(a*e*(m + 1))), x] /; FreeQ[{a, b, c, d, e, m, n, p}, x] && NeQ[b*c - a*d, 0] && EqQ[
a*d*(m + 1) - b*c*(m + n*(p + 1) + 1), 0] && NeQ[m, -1]

Rule 2081

Int[(u_.)*(P_)^(p_.), x_Symbol] :> With[{m = MinimumMonomialExponent[P, x]}, Dist[P^FracPart[p]/(x^(m*FracPart
[p])*Distrib[1/x^m, P]^FracPart[p]), Int[u*x^(m*p)*Distrib[1/x^m, P]^p, x], x]] /; FreeQ[p, x] &&  !IntegerQ[p
] && SumQ[P] && EveryQ[BinomialQ[#1, x] & , P] &&  !PolyQ[P, x, 2]

Rubi steps

\begin {align*} \int \frac {1+x^2}{\left (-1+x^2\right ) \sqrt {-x+x^3}} \, dx &=\frac {\left (\sqrt {x} \sqrt {-1+x^2}\right ) \int \frac {1+x^2}{\sqrt {x} \left (-1+x^2\right )^{3/2}} \, dx}{\sqrt {-x+x^3}}\\ &=-\frac {2 x}{\sqrt {-x+x^3}}\\ \end {align*}

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Mathematica [A]
time = 0.15, size = 14, normalized size = 0.70 \begin {gather*} -\frac {2 x}{\sqrt {x \left (-1+x^2\right )}} \end {gather*}

Antiderivative was successfully verified.

[In]

Integrate[(1 + x^2)/((-1 + x^2)*Sqrt[-x + x^3]),x]

[Out]

(-2*x)/Sqrt[x*(-1 + x^2)]

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Maple [B] Leaf count of result is larger than twice the leaf count of optimal. \(40\) vs. \(2(18)=36\).
time = 0.45, size = 41, normalized size = 2.05

method	result	size
gosper	\(-\frac {2 x}{\sqrt {x^{3}-x}}\)	\(13\)
risch	\(-\frac {2 x}{\sqrt {x \left (x^{2}-1\right )}}\)	\(13\)
elliptic	\(-\frac {2 x}{\sqrt {x \left (x^{2}-1\right )}}\)	\(13\)
trager	\(-\frac {2 \sqrt {x^{3}-x}}{x^{2}-1}\)	\(19\)
default	\(\frac {x^{2}-x}{\sqrt {\left (1+x \right ) \left (x^{2}-x \right )}}-\frac {x^{2}+x}{\sqrt {\left (-1+x \right ) \left (x^{2}+x \right )}}\)	\(41\)
meijerg	\(-\frac {2 \sqrt {-\mathrm {signum}\left (x^{2}-1\right )}\, \sqrt {x}\, \hypergeom \left (\left [\frac {1}{4}, \frac {3}{2}\right ], \left [\frac {5}{4}\right ], x^{2}\right )}{\sqrt {\mathrm {signum}\left (x^{2}-1\right )}}-\frac {2 \sqrt {-\mathrm {signum}\left (x^{2}-1\right )}\, x^{\frac {5}{2}} \hypergeom \left (\left [\frac {5}{4}, \frac {3}{2}\right ], \left [\frac {9}{4}\right ], x^{2}\right )}{5 \sqrt {\mathrm {signum}\left (x^{2}-1\right )}}\)	\(66\)

Verification of antiderivative is not currently implemented for this CAS.

[In]

int((x^2+1)/(x^2-1)/(x^3-x)^(1/2),x,method=_RETURNVERBOSE)

[Out]

(x^2-x)/((1+x)*(x^2-x))^(1/2)-(x^2+x)/((-1+x)*(x^2+x))^(1/2)

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Maxima [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {Failed to integrate} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((x^2+1)/(x^2-1)/(x^3-x)^(1/2),x, algorithm="maxima")

[Out]

integrate((x^2 + 1)/(sqrt(x^3 - x)*(x^2 - 1)), x)

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Fricas [A]
time = 0.33, size = 18, normalized size = 0.90 \begin {gather*} -\frac {2 \, \sqrt {x^{3} - x}}{x^{2} - 1} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((x^2+1)/(x^2-1)/(x^3-x)^(1/2),x, algorithm="fricas")

[Out]

-2*sqrt(x^3 - x)/(x^2 - 1)

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Sympy [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \int \frac {x^{2} + 1}{\sqrt {x \left (x - 1\right ) \left (x + 1\right )} \left (x - 1\right ) \left (x + 1\right )}\, dx \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((x**2+1)/(x**2-1)/(x**3-x)**(1/2),x)

[Out]

Integral((x**2 + 1)/(sqrt(x*(x - 1)*(x + 1))*(x - 1)*(x + 1)), x)

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Giac [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {could not integrate} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((x^2+1)/(x^2-1)/(x^3-x)^(1/2),x, algorithm="giac")

[Out]

integrate((x^2 + 1)/(sqrt(x^3 - x)*(x^2 - 1)), x)

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Mupad [B]
time = 0.07, size = 12, normalized size = 0.60 \begin {gather*} -\frac {2\,x}{\sqrt {x^3-x}} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int((x^2 + 1)/((x^3 - x)^(1/2)*(x^2 - 1)),x)

[Out]

-(2*x)/(x^3 - x)^(1/2)

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