3.879 \(\int \frac {x^5}{\sqrt {1-x^4}} \, dx\)

Optimal. Leaf size=27 \[ \frac {1}{4} \sin ^{-1}\left (x^2\right )-\frac {1}{4} x^2 \sqrt {1-x^4} \]

[Out]

1/4*arcsin(x^2)-1/4*x^2*(-x^4+1)^(1/2)

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Rubi [A]  time = 0.01, antiderivative size = 27, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 3, integrand size = 15, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.200, Rules used = {275, 321, 216} \[ \frac {1}{4} \sin ^{-1}\left (x^2\right )-\frac {1}{4} x^2 \sqrt {1-x^4} \]

Antiderivative was successfully verified.

[In]

Int[x^5/Sqrt[1 - x^4],x]

[Out]

-(x^2*Sqrt[1 - x^4])/4 + ArcSin[x^2]/4

Rule 216

Int[1/Sqrt[(a_) + (b_.)*(x_)^2], x_Symbol] :> Simp[ArcSin[(Rt[-b, 2]*x)/Sqrt[a]]/Rt[-b, 2], x] /; FreeQ[{a, b}
, x] && GtQ[a, 0] && NegQ[b]

Rule 275

Int[(x_)^(m_.)*((a_) + (b_.)*(x_)^(n_))^(p_), x_Symbol] :> With[{k = GCD[m + 1, n]}, Dist[1/k, Subst[Int[x^((m
+ 1)/k - 1)*(a + b*x^(n/k))^p, x], x, x^k], x] /; k != 1] /; FreeQ[{a, b, p}, x] && IGtQ[n, 0] && IntegerQ[m]

Rule 321

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

Rubi steps

\begin {align*} \int \frac {x^5}{\sqrt {1-x^4}} \, dx &=\frac {1}{2} \operatorname {Subst}\left (\int \frac {x^2}{\sqrt {1-x^2}} \, dx,x,x^2\right )\\ &=-\frac {1}{4} x^2 \sqrt {1-x^4}+\frac {1}{4} \operatorname {Subst}\left (\int \frac {1}{\sqrt {1-x^2}} \, dx,x,x^2\right )\\ &=-\frac {1}{4} x^2 \sqrt {1-x^4}+\frac {1}{4} \sin ^{-1}\left (x^2\right )\\ \end {align*}

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Mathematica [A]  time = 0.01, size = 27, normalized size = 1.00 \[ \frac {1}{4} \sin ^{-1}\left (x^2\right )-\frac {1}{4} x^2 \sqrt {1-x^4} \]

Antiderivative was successfully verified.

[In]

Integrate[x^5/Sqrt[1 - x^4],x]

[Out]

-1/4*(x^2*Sqrt[1 - x^4]) + ArcSin[x^2]/4

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fricas [A]  time = 0.86, size = 33, normalized size = 1.22 \[ -\frac {1}{4} \, \sqrt {-x^{4} + 1} x^{2} - \frac {1}{2} \, \arctan \left (\frac {\sqrt {-x^{4} + 1} - 1}{x^{2}}\right ) \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^5/(-x^4+1)^(1/2),x, algorithm="fricas")

[Out]

-1/4*sqrt(-x^4 + 1)*x^2 - 1/2*arctan((sqrt(-x^4 + 1) - 1)/x^2)

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giac [A]  time = 0.18, size = 21, normalized size = 0.78 \[ -\frac {1}{4} \, \sqrt {-x^{4} + 1} x^{2} + \frac {1}{4} \, \arcsin \left (x^{2}\right ) \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^5/(-x^4+1)^(1/2),x, algorithm="giac")

[Out]

-1/4*sqrt(-x^4 + 1)*x^2 + 1/4*arcsin(x^2)

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maple [A]  time = 0.01, size = 22, normalized size = 0.81 \[ -\frac {\sqrt {-x^{4}+1}\, x^{2}}{4}+\frac {\arcsin \left (x^{2}\right )}{4} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(x^5/(-x^4+1)^(1/2),x)

[Out]

1/4*arcsin(x^2)-1/4*x^2*(-x^4+1)^(1/2)

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maxima [B]  time = 2.97, size = 44, normalized size = 1.63 \[ \frac {\sqrt {-x^{4} + 1}}{4 \, x^{2} {\left (\frac {x^{4} - 1}{x^{4}} - 1\right )}} - \frac {1}{4} \, \arctan \left (\frac {\sqrt {-x^{4} + 1}}{x^{2}}\right ) \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^5/(-x^4+1)^(1/2),x, algorithm="maxima")

[Out]

1/4*sqrt(-x^4 + 1)/(x^2*((x^4 - 1)/x^4 - 1)) - 1/4*arctan(sqrt(-x^4 + 1)/x^2)

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mupad [F]  time = 0.00, size = -1, normalized size = -0.04 \[ \int \frac {x^5}{\sqrt {1-x^4}} \,d x \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(x^5/(1 - x^4)^(1/2),x)

[Out]

int(x^5/(1 - x^4)^(1/2), x)

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sympy [A]  time = 3.18, size = 61, normalized size = 2.26 \[ \begin {cases} - \frac {i x^{2} \sqrt {x^{4} - 1}}{4} - \frac {i \operatorname {acosh}{\left (x^{2} \right )}}{4} & \text {for}\: \left |{x^{4}}\right | > 1 \\\frac {x^{6}}{4 \sqrt {1 - x^{4}}} - \frac {x^{2}}{4 \sqrt {1 - x^{4}}} + \frac {\operatorname {asin}{\left (x^{2} \right )}}{4} & \text {otherwise} \end {cases} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x**5/(-x**4+1)**(1/2),x)

[Out]

Piecewise((-I*x**2*sqrt(x**4 - 1)/4 - I*acosh(x**2)/4, Abs(x**4) > 1), (x**6/(4*sqrt(1 - x**4)) - x**2/(4*sqrt
(1 - x**4)) + asin(x**2)/4, True))

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