3.689 \(\int \frac {x^5}{2+3 x^4} \, dx\)

Optimal. Leaf size=29 \[ \frac {x^2}{6}-\frac {\tan ^{-1}\left (\sqrt {\frac {3}{2}} x^2\right )}{3 \sqrt {6}} \]

[Out]

1/6*x^2-1/18*arctan(1/2*x^2*6^(1/2))*6^(1/2)

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Rubi [A]  time = 0.01, antiderivative size = 29, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 3, integrand size = 13, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.231, Rules used = {275, 321, 203} \[ \frac {x^2}{6}-\frac {\tan ^{-1}\left (\sqrt {\frac {3}{2}} x^2\right )}{3 \sqrt {6}} \]

Antiderivative was successfully verified.

[In]

Int[x^5/(2 + 3*x^4),x]

[Out]

x^2/6 - ArcTan[Sqrt[3/2]*x^2]/(3*Sqrt[6])

Rule 203

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

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}{2+3 x^4} \, dx &=\frac {1}{2} \operatorname {Subst}\left (\int \frac {x^2}{2+3 x^2} \, dx,x,x^2\right )\\ &=\frac {x^2}{6}-\frac {1}{3} \operatorname {Subst}\left (\int \frac {1}{2+3 x^2} \, dx,x,x^2\right )\\ &=\frac {x^2}{6}-\frac {\tan ^{-1}\left (\sqrt {\frac {3}{2}} x^2\right )}{3 \sqrt {6}}\\ \end {align*}

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Mathematica [A]  time = 0.01, size = 29, normalized size = 1.00 \[ \frac {x^2}{6}-\frac {\tan ^{-1}\left (\sqrt {\frac {3}{2}} x^2\right )}{3 \sqrt {6}} \]

Antiderivative was successfully verified.

[In]

Integrate[x^5/(2 + 3*x^4),x]

[Out]

x^2/6 - ArcTan[Sqrt[3/2]*x^2]/(3*Sqrt[6])

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fricas [A]  time = 0.62, size = 20, normalized size = 0.69 \[ \frac {1}{6} \, x^{2} - \frac {1}{18} \, \sqrt {6} \arctan \left (\frac {1}{2} \, \sqrt {6} x^{2}\right ) \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^5/(3*x^4+2),x, algorithm="fricas")

[Out]

1/6*x^2 - 1/18*sqrt(6)*arctan(1/2*sqrt(6)*x^2)

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giac [A]  time = 0.19, size = 20, normalized size = 0.69 \[ \frac {1}{6} \, x^{2} - \frac {1}{18} \, \sqrt {6} \arctan \left (\frac {1}{2} \, \sqrt {6} x^{2}\right ) \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^5/(3*x^4+2),x, algorithm="giac")

[Out]

1/6*x^2 - 1/18*sqrt(6)*arctan(1/2*sqrt(6)*x^2)

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maple [A]  time = 0.00, size = 21, normalized size = 0.72 \[ \frac {x^{2}}{6}-\frac {\sqrt {6}\, \arctan \left (\frac {\sqrt {6}\, x^{2}}{2}\right )}{18} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(x^5/(3*x^4+2),x)

[Out]

1/6*x^2-1/18*6^(1/2)*arctan(1/2*6^(1/2)*x^2)

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maxima [A]  time = 2.93, size = 20, normalized size = 0.69 \[ \frac {1}{6} \, x^{2} - \frac {1}{18} \, \sqrt {6} \arctan \left (\frac {1}{2} \, \sqrt {6} x^{2}\right ) \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^5/(3*x^4+2),x, algorithm="maxima")

[Out]

1/6*x^2 - 1/18*sqrt(6)*arctan(1/2*sqrt(6)*x^2)

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mupad [B]  time = 1.01, size = 20, normalized size = 0.69 \[ \frac {x^2}{6}-\frac {\sqrt {6}\,\mathrm {atan}\left (\frac {\sqrt {6}\,x^2}{2}\right )}{18} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(x^5/(3*x^4 + 2),x)

[Out]

x^2/6 - (6^(1/2)*atan((6^(1/2)*x^2)/2))/18

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sympy [A]  time = 0.16, size = 22, normalized size = 0.76 \[ \frac {x^{2}}{6} - \frac {\sqrt {6} \operatorname {atan}{\left (\frac {\sqrt {6} x^{2}}{2} \right )}}{18} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x**5/(3*x**4+2),x)

[Out]

x**2/6 - sqrt(6)*atan(sqrt(6)*x**2/2)/18

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