3.285 \(\int \frac{-1-5 x+2 x^2}{2-x-2 x^2+x^3} \, dx\)

Optimal. Leaf size=21 \[ 2 \log (1-x)-\log (2-x)+\log (x+1) \]

[Out]

2*Log[1 - x] - Log[2 - x] + Log[1 + x]

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Rubi [A]  time = 0.0298171, antiderivative size = 21, normalized size of antiderivative = 1., number of steps used = 2, number of rules used = 1, integrand size = 26, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.038, Rules used = {2074} \[ 2 \log (1-x)-\log (2-x)+\log (x+1) \]

Antiderivative was successfully verified.

[In]

Int[(-1 - 5*x + 2*x^2)/(2 - x - 2*x^2 + x^3),x]

[Out]

2*Log[1 - x] - Log[2 - x] + Log[1 + x]

Rule 2074

Int[(P_)^(p_)*(Q_)^(q_.), x_Symbol] :> With[{PP = Factor[P]}, Int[ExpandIntegrand[PP^p*Q^q, x], x] /;  !SumQ[N
onfreeFactors[PP, x]]] /; FreeQ[q, x] && PolyQ[P, x] && PolyQ[Q, x] && IntegerQ[p] && NeQ[P, x]

Rubi steps

\begin{align*} \int \frac{-1-5 x+2 x^2}{2-x-2 x^2+x^3} \, dx &=\int \left (\frac{1}{2-x}+\frac{2}{-1+x}+\frac{1}{1+x}\right ) \, dx\\ &=2 \log (1-x)-\log (2-x)+\log (1+x)\\ \end{align*}

Mathematica [A]  time = 0.0068186, size = 21, normalized size = 1. \[ 2 \log (1-x)-\log (2-x)+\log (x+1) \]

Antiderivative was successfully verified.

[In]

Integrate[(-1 - 5*x + 2*x^2)/(2 - x - 2*x^2 + x^3),x]

[Out]

2*Log[1 - x] - Log[2 - x] + Log[1 + x]

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Maple [A]  time = 0.007, size = 18, normalized size = 0.9 \begin{align*} 2\,\ln \left ( x-1 \right ) +\ln \left ( 1+x \right ) -\ln \left ( -2+x \right ) \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int((2*x^2-5*x-1)/(x^3-2*x^2-x+2),x)

[Out]

2*ln(x-1)+ln(1+x)-ln(-2+x)

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Maxima [A]  time = 0.992899, size = 23, normalized size = 1.1 \begin{align*} \log \left (x + 1\right ) + 2 \, \log \left (x - 1\right ) - \log \left (x - 2\right ) \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((2*x^2-5*x-1)/(x^3-2*x^2-x+2),x, algorithm="maxima")

[Out]

log(x + 1) + 2*log(x - 1) - log(x - 2)

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Fricas [A]  time = 1.57002, size = 54, normalized size = 2.57 \begin{align*} \log \left (x + 1\right ) + 2 \, \log \left (x - 1\right ) - \log \left (x - 2\right ) \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((2*x^2-5*x-1)/(x^3-2*x^2-x+2),x, algorithm="fricas")

[Out]

log(x + 1) + 2*log(x - 1) - log(x - 2)

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Sympy [A]  time = 0.117912, size = 15, normalized size = 0.71 \begin{align*} - \log{\left (x - 2 \right )} + 2 \log{\left (x - 1 \right )} + \log{\left (x + 1 \right )} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((2*x**2-5*x-1)/(x**3-2*x**2-x+2),x)

[Out]

-log(x - 2) + 2*log(x - 1) + log(x + 1)

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Giac [A]  time = 1.31567, size = 27, normalized size = 1.29 \begin{align*} \log \left ({\left | x + 1 \right |}\right ) + 2 \, \log \left ({\left | x - 1 \right |}\right ) - \log \left ({\left | x - 2 \right |}\right ) \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((2*x^2-5*x-1)/(x^3-2*x^2-x+2),x, algorithm="giac")

[Out]

log(abs(x + 1)) + 2*log(abs(x - 1)) - log(abs(x - 2))