3.1940 \(\int \frac{a+b x}{(a^2+2 a b x+b^2 x^2)^2} \, dx\)

Optimal. Leaf size=14 \[ -\frac{1}{2 b (a+b x)^2} \]

[Out]

-1/(2*b*(a + b*x)^2)

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Rubi [A]  time = 0.0024815, antiderivative size = 14, normalized size of antiderivative = 1., number of steps used = 2, number of rules used = 2, integrand size = 24, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.083, Rules used = {27, 32} \[ -\frac{1}{2 b (a+b x)^2} \]

Antiderivative was successfully verified.

[In]

Int[(a + b*x)/(a^2 + 2*a*b*x + b^2*x^2)^2,x]

[Out]

-1/(2*b*(a + b*x)^2)

Rule 27

Int[(u_.)*((a_) + (b_.)*(x_) + (c_.)*(x_)^2)^(p_.), x_Symbol] :> Int[u*Cancel[(b/2 + c*x)^(2*p)/c^p], x] /; Fr
eeQ[{a, b, c}, x] && EqQ[b^2 - 4*a*c, 0] && IntegerQ[p]

Rule 32

Int[((a_.) + (b_.)*(x_))^(m_), x_Symbol] :> Simp[(a + b*x)^(m + 1)/(b*(m + 1)), x] /; FreeQ[{a, b, m}, x] && N
eQ[m, -1]

Rubi steps

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

Mathematica [A]  time = 0.0026421, size = 14, normalized size = 1. \[ -\frac{1}{2 b (a+b x)^2} \]

Antiderivative was successfully verified.

[In]

Integrate[(a + b*x)/(a^2 + 2*a*b*x + b^2*x^2)^2,x]

[Out]

-1/(2*b*(a + b*x)^2)

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Maple [A]  time = 0.003, size = 13, normalized size = 0.9 \begin{align*} -{\frac{1}{2\,b \left ( bx+a \right ) ^{2}}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int((b*x+a)/(b^2*x^2+2*a*b*x+a^2)^2,x)

[Out]

-1/2/b/(b*x+a)^2

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Maxima [A]  time = 0.968606, size = 31, normalized size = 2.21 \begin{align*} -\frac{1}{2 \,{\left (b^{2} x^{2} + 2 \, a b x + a^{2}\right )} b} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((b*x+a)/(b^2*x^2+2*a*b*x+a^2)^2,x, algorithm="maxima")

[Out]

-1/2/((b^2*x^2 + 2*a*b*x + a^2)*b)

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Fricas [A]  time = 1.49037, size = 49, normalized size = 3.5 \begin{align*} -\frac{1}{2 \,{\left (b^{3} x^{2} + 2 \, a b^{2} x + a^{2} b\right )}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((b*x+a)/(b^2*x^2+2*a*b*x+a^2)^2,x, algorithm="fricas")

[Out]

-1/2/(b^3*x^2 + 2*a*b^2*x + a^2*b)

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Sympy [B]  time = 0.326833, size = 26, normalized size = 1.86 \begin{align*} - \frac{1}{2 a^{2} b + 4 a b^{2} x + 2 b^{3} x^{2}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((b*x+a)/(b**2*x**2+2*a*b*x+a**2)**2,x)

[Out]

-1/(2*a**2*b + 4*a*b**2*x + 2*b**3*x**2)

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Giac [A]  time = 1.14184, size = 16, normalized size = 1.14 \begin{align*} -\frac{1}{2 \,{\left (b x + a\right )}^{2} b} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((b*x+a)/(b^2*x^2+2*a*b*x+a^2)^2,x, algorithm="giac")

[Out]

-1/2/((b*x + a)^2*b)