3.3.20 \(\int \frac {1}{x^5 \sqrt {x+x^4}} \, dx\)

Optimal. Leaf size=23 \[ \frac {2 \left (2 x^3-1\right ) \sqrt {x^4+x}}{9 x^5} \]

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Rubi [A]  time = 0.04, antiderivative size = 33, normalized size of antiderivative = 1.43, number of steps used = 2, number of rules used = 2, integrand size = 13, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.154, Rules used = {2016, 2014} \begin {gather*} \frac {4 \sqrt {x^4+x}}{9 x^2}-\frac {2 \sqrt {x^4+x}}{9 x^5} \end {gather*}

Antiderivative was successfully verified.

[In]

Int[1/(x^5*Sqrt[x + x^4]),x]

[Out]

(-2*Sqrt[x + x^4])/(9*x^5) + (4*Sqrt[x + x^4])/(9*x^2)

Rule 2014

Int[((c_.)*(x_))^(m_.)*((a_.)*(x_)^(j_.) + (b_.)*(x_)^(n_.))^(p_), x_Symbol] :> -Simp[(c^(j - 1)*(c*x)^(m - j
+ 1)*(a*x^j + b*x^n)^(p + 1))/(a*(n - j)*(p + 1)), x] /; FreeQ[{a, b, c, j, m, n, p}, x] &&  !IntegerQ[p] && N
eQ[n, j] && EqQ[m + n*p + n - j + 1, 0] && (IntegerQ[j] || GtQ[c, 0])

Rule 2016

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

Rubi steps

\begin {align*} \int \frac {1}{x^5 \sqrt {x+x^4}} \, dx &=-\frac {2 \sqrt {x+x^4}}{9 x^5}-\frac {2}{3} \int \frac {1}{x^2 \sqrt {x+x^4}} \, dx\\ &=-\frac {2 \sqrt {x+x^4}}{9 x^5}+\frac {4 \sqrt {x+x^4}}{9 x^2}\\ \end {align*}

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Mathematica [A]  time = 0.01, size = 23, normalized size = 1.00 \begin {gather*} \frac {2 \left (2 x^3-1\right ) \sqrt {x^4+x}}{9 x^5} \end {gather*}

Antiderivative was successfully verified.

[In]

Integrate[1/(x^5*Sqrt[x + x^4]),x]

[Out]

(2*(-1 + 2*x^3)*Sqrt[x + x^4])/(9*x^5)

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IntegrateAlgebraic [A]  time = 0.38, size = 23, normalized size = 1.00 \begin {gather*} \frac {2 \left (-1+2 x^3\right ) \sqrt {x+x^4}}{9 x^5} \end {gather*}

Antiderivative was successfully verified.

[In]

IntegrateAlgebraic[1/(x^5*Sqrt[x + x^4]),x]

[Out]

(2*(-1 + 2*x^3)*Sqrt[x + x^4])/(9*x^5)

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fricas [A]  time = 0.45, size = 19, normalized size = 0.83 \begin {gather*} \frac {2 \, \sqrt {x^{4} + x} {\left (2 \, x^{3} - 1\right )}}{9 \, x^{5}} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

2/9*sqrt(x^4 + x)*(2*x^3 - 1)/x^5

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giac [A]  time = 0.59, size = 19, normalized size = 0.83 \begin {gather*} -\frac {2}{9} \, {\left (\frac {1}{x^{3}} + 1\right )}^{\frac {3}{2}} + \frac {2}{3} \, \sqrt {\frac {1}{x^{3}} + 1} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

-2/9*(1/x^3 + 1)^(3/2) + 2/3*sqrt(1/x^3 + 1)

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maple [A]  time = 0.09, size = 20, normalized size = 0.87

method	result	size
trager	\(\frac {2 \left (2 x^{3}-1\right ) \sqrt {x^{4}+x}}{9 x^{5}}\)	\(20\)
meijerg	\(-\frac {2 \left (-2 x^{3}+1\right ) \sqrt {x^{3}+1}}{9 x^{\frac {9}{2}}}\)	\(20\)
risch	\(\frac {\frac {2}{9} x^{3}-\frac {2}{9}+\frac {4}{9} x^{6}}{x^{4} \sqrt {x \left (x^{3}+1\right )}}\)	\(25\)
default	\(-\frac {2 \sqrt {x^{4}+x}}{9 x^{5}}+\frac {4 \sqrt {x^{4}+x}}{9 x^{2}}\)	\(26\)
elliptic	\(-\frac {2 \sqrt {x^{4}+x}}{9 x^{5}}+\frac {4 \sqrt {x^{4}+x}}{9 x^{2}}\)	\(26\)
gosper	\(\frac {2 \left (x^{2}-x +1\right ) \left (1+x \right ) \left (2 x^{3}-1\right )}{9 x^{4} \sqrt {x^{4}+x}}\)	\(31\)

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(1/x^5/(x^4+x)^(1/2),x,method=_RETURNVERBOSE)

[Out]

2/9*(2*x^3-1)*(x^4+x)^(1/2)/x^5

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maxima [A]  time = 0.91, size = 32, normalized size = 1.39 \begin {gather*} \frac {2 \, {\left (2 \, x^{7} + x^{4} - x\right )}}{9 \, \sqrt {x^{2} - x + 1} \sqrt {x + 1} x^{\frac {11}{2}}} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

2/9*(2*x^7 + x^4 - x)/(sqrt(x^2 - x + 1)*sqrt(x + 1)*x^(11/2))

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mupad [B]  time = 0.16, size = 19, normalized size = 0.83 \begin {gather*} \frac {2\,\left (2\,x^3-1\right )\,\sqrt {x^4+x}}{9\,x^5} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(1/(x^5*(x + x^4)^(1/2)),x)

[Out]

(2*(2*x^3 - 1)*(x + x^4)^(1/2))/(9*x^5)

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sympy [F]  time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \int \frac {1}{x^{5} \sqrt {x \left (x + 1\right ) \left (x^{2} - x + 1\right )}}\, dx \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

Integral(1/(x**5*sqrt(x*(x + 1)*(x**2 - x + 1))), x)

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