3.18 \(\int \frac{1}{x^4} \, dx\)

Optimal. Leaf size=7 \[ -\frac{1}{3 x^3} \]

[Out]

-1/(3*x^3)

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Rubi [A]  time = 0.0004275, antiderivative size = 7, normalized size of antiderivative = 1., number of steps used = 1, number of rules used = 1, integrand size = 3, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.333, Rules used = {30} \[ -\frac{1}{3 x^3} \]

Antiderivative was successfully verified.

[In]

Int[x^(-4),x]

[Out]

-1/(3*x^3)

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 \frac{1}{x^4} \, dx &=-\frac{1}{3 x^3}\\ \end{align*}

Mathematica [A]  time = 0.0001591, size = 7, normalized size = 1. \[ -\frac{1}{3 x^3} \]

Antiderivative was successfully verified.

[In]

Integrate[x^(-4),x]

[Out]

-1/(3*x^3)

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Maple [A]  time = 0., size = 6, normalized size = 0.9 \begin{align*} -{\frac{1}{3\,{x}^{3}}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(1/x^4,x)

[Out]

-1/3/x^3

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Maxima [A]  time = 0.970812, size = 7, normalized size = 1. \begin{align*} -\frac{1}{3 \, x^{3}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

-1/3/x^3

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Fricas [A]  time = 1.45742, size = 14, normalized size = 2. \begin{align*} -\frac{1}{3 \, x^{3}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

-1/3/x^3

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Sympy [A]  time = 0.050997, size = 7, normalized size = 1. \begin{align*} - \frac{1}{3 x^{3}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(1/x**4,x)

[Out]

-1/(3*x**3)

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Giac [A]  time = 1.15655, size = 7, normalized size = 1. \begin{align*} -\frac{1}{3 \, x^{3}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(1/x^4,x, algorithm="giac")

[Out]

-1/3/x^3