3.113 \(\int (\frac {b}{x^2})^{2/3} \, dx\)

Optimal. Leaf size=12 \[ -3 x \left (\frac {b}{x^2}\right )^{2/3} \]

[Out]

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

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Rubi [A]  time = 0.00, antiderivative size = 12, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, integrand size = 9, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.222, Rules used = {15, 30} \[ -3 x \left (\frac {b}{x^2}\right )^{2/3} \]

Antiderivative was successfully verified.

[In]

Int[(b/x^2)^(2/3),x]

[Out]

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

Rule 15

Int[(u_.)*((a_.)*(x_)^(n_))^(m_), x_Symbol] :> Dist[(a^IntPart[m]*(a*x^n)^FracPart[m])/x^(n*FracPart[m]), Int[
u*x^(m*n), x], x] /; FreeQ[{a, m, n}, x] &&  !IntegerQ[m]

Rule 30

Int[(x_)^(m_.), x_Symbol] :> Simp[x^(m + 1)/(m + 1), x] /; FreeQ[m, x] && NeQ[m, -1]

Rubi steps

\begin {align*} \int \left (\frac {b}{x^2}\right )^{2/3} \, dx &=\left (\left (\frac {b}{x^2}\right )^{2/3} x^{4/3}\right ) \int \frac {1}{x^{4/3}} \, dx\\ &=-3 \left (\frac {b}{x^2}\right )^{2/3} x\\ \end {align*}

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Mathematica [A]  time = 0.01, size = 12, normalized size = 1.00 \[ -3 x \left (\frac {b}{x^2}\right )^{2/3} \]

Antiderivative was successfully verified.

[In]

Integrate[(b/x^2)^(2/3),x]

[Out]

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

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fricas [A]  time = 0.86, size = 10, normalized size = 0.83 \[ -3 \, x \left (\frac {b}{x^{2}}\right )^{\frac {2}{3}} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((b/x^2)^(2/3),x, algorithm="fricas")

[Out]

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

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giac [F]  time = 0.00, size = 0, normalized size = 0.00 \[ \int \left (\frac {b}{x^{2}}\right )^{\frac {2}{3}}\,{d x} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((b/x^2)^(2/3),x, algorithm="giac")

[Out]

integrate((b/x^2)^(2/3), x)

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maple [A]  time = 0.00, size = 11, normalized size = 0.92 \[ -3 \left (\frac {b}{x^{2}}\right )^{\frac {2}{3}} x \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int((b/x^2)^(2/3),x)

[Out]

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

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maxima [A]  time = 1.36, size = 10, normalized size = 0.83 \[ -3 \, x \left (\frac {b}{x^{2}}\right )^{\frac {2}{3}} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((b/x^2)^(2/3),x, algorithm="maxima")

[Out]

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

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mupad [B]  time = 0.93, size = 11, normalized size = 0.92 \[ -3\,b^{2/3}\,x\,{\left (\frac {1}{x^2}\right )}^{2/3} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int((b/x^2)^(2/3),x)

[Out]

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

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sympy [A]  time = 0.48, size = 17, normalized size = 1.42 \[ - 3 b^{\frac {2}{3}} x \left (\frac {1}{x^{2}}\right )^{\frac {2}{3}} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((b/x**2)**(2/3),x)

[Out]

-3*b**(2/3)*x*(x**(-2))**(2/3)

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