3.1159 \(\int \frac{A+B x}{(b x+c x^2)^3} \, dx\)

Optimal. Leaf size=109 \[ -\frac{b B-3 A c}{b^4 x}-\frac{c (2 b B-3 A c)}{b^4 (b+c x)}-\frac{c (b B-A c)}{2 b^3 (b+c x)^2}-\frac{3 c \log (x) (b B-2 A c)}{b^5}+\frac{3 c (b B-2 A c) \log (b+c x)}{b^5}-\frac{A}{2 b^3 x^2} \]

[Out]

-A/(2*b^3*x^2) - (b*B - 3*A*c)/(b^4*x) - (c*(b*B - A*c))/(2*b^3*(b + c*x)^2) - (c*(2*b*B - 3*A*c))/(b^4*(b + c
*x)) - (3*c*(b*B - 2*A*c)*Log[x])/b^5 + (3*c*(b*B - 2*A*c)*Log[b + c*x])/b^5

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Rubi [A]  time = 0.0986541, antiderivative size = 109, normalized size of antiderivative = 1., number of steps used = 2, number of rules used = 1, integrand size = 17, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.059, Rules used = {631} \[ -\frac{b B-3 A c}{b^4 x}-\frac{c (2 b B-3 A c)}{b^4 (b+c x)}-\frac{c (b B-A c)}{2 b^3 (b+c x)^2}-\frac{3 c \log (x) (b B-2 A c)}{b^5}+\frac{3 c (b B-2 A c) \log (b+c x)}{b^5}-\frac{A}{2 b^3 x^2} \]

Antiderivative was successfully verified.

[In]

Int[(A + B*x)/(b*x + c*x^2)^3,x]

[Out]

-A/(2*b^3*x^2) - (b*B - 3*A*c)/(b^4*x) - (c*(b*B - A*c))/(2*b^3*(b + c*x)^2) - (c*(2*b*B - 3*A*c))/(b^4*(b + c
*x)) - (3*c*(b*B - 2*A*c)*Log[x])/b^5 + (3*c*(b*B - 2*A*c)*Log[b + c*x])/b^5

Rule 631

Int[((d_.) + (e_.)*(x_))*((a_.) + (b_.)*(x_) + (c_.)*(x_)^2)^(p_.), x_Symbol] :> Int[ExpandIntegrand[(d + e*x)
*(a + b*x + c*x^2)^p, x], x] /; FreeQ[{a, b, c, d, e}, x] && NeQ[2*c*d - b*e, 0] && IntegerQ[p] && (GtQ[p, 0]
|| EqQ[a, 0])

Rubi steps

\begin{align*} \int \frac{A+B x}{\left (b x+c x^2\right )^3} \, dx &=\int \left (\frac{A}{b^3 x^3}+\frac{b B-3 A c}{b^4 x^2}-\frac{3 c (b B-2 A c)}{b^5 x}+\frac{c^2 (b B-A c)}{b^3 (b+c x)^3}+\frac{c^2 (2 b B-3 A c)}{b^4 (b+c x)^2}+\frac{3 c^2 (b B-2 A c)}{b^5 (b+c x)}\right ) \, dx\\ &=-\frac{A}{2 b^3 x^2}-\frac{b B-3 A c}{b^4 x}-\frac{c (b B-A c)}{2 b^3 (b+c x)^2}-\frac{c (2 b B-3 A c)}{b^4 (b+c x)}-\frac{3 c (b B-2 A c) \log (x)}{b^5}+\frac{3 c (b B-2 A c) \log (b+c x)}{b^5}\\ \end{align*}

Mathematica [A]  time = 0.0819153, size = 106, normalized size = 0.97 \[ \frac{-\frac{b \left (A \left (-4 b^2 c x+b^3-18 b c^2 x^2-12 c^3 x^3\right )+b B x \left (2 b^2+9 b c x+6 c^2 x^2\right )\right )}{x^2 (b+c x)^2}+6 c \log (x) (2 A c-b B)+6 c (b B-2 A c) \log (b+c x)}{2 b^5} \]

Antiderivative was successfully verified.

[In]

Integrate[(A + B*x)/(b*x + c*x^2)^3,x]

[Out]

(-((b*(b*B*x*(2*b^2 + 9*b*c*x + 6*c^2*x^2) + A*(b^3 - 4*b^2*c*x - 18*b*c^2*x^2 - 12*c^3*x^3)))/(x^2*(b + c*x)^
2)) + 6*c*(-(b*B) + 2*A*c)*Log[x] + 6*c*(b*B - 2*A*c)*Log[b + c*x])/(2*b^5)

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Maple [A]  time = 0.01, size = 138, normalized size = 1.3 \begin{align*} -{\frac{A}{2\,{b}^{3}{x}^{2}}}+3\,{\frac{Ac}{{b}^{4}x}}-{\frac{B}{{b}^{3}x}}+6\,{\frac{{c}^{2}\ln \left ( x \right ) A}{{b}^{5}}}-3\,{\frac{Bc\ln \left ( x \right ) }{{b}^{4}}}-6\,{\frac{{c}^{2}\ln \left ( cx+b \right ) A}{{b}^{5}}}+3\,{\frac{c\ln \left ( cx+b \right ) B}{{b}^{4}}}+3\,{\frac{A{c}^{2}}{{b}^{4} \left ( cx+b \right ) }}-2\,{\frac{Bc}{{b}^{3} \left ( cx+b \right ) }}+{\frac{A{c}^{2}}{2\,{b}^{3} \left ( cx+b \right ) ^{2}}}-{\frac{Bc}{2\,{b}^{2} \left ( cx+b \right ) ^{2}}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int((B*x+A)/(c*x^2+b*x)^3,x)

[Out]

-1/2*A/b^3/x^2+3/b^4/x*A*c-1/b^3/x*B+6*c^2/b^5*ln(x)*A-3*c/b^4*ln(x)*B-6*c^2/b^5*ln(c*x+b)*A+3*c/b^4*ln(c*x+b)
*B+3*c^2/b^4/(c*x+b)*A-2*c/b^3/(c*x+b)*B+1/2*c^2/b^3/(c*x+b)^2*A-1/2*c/b^2/(c*x+b)^2*B

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Maxima [A]  time = 1.15987, size = 177, normalized size = 1.62 \begin{align*} -\frac{A b^{3} + 6 \,{\left (B b c^{2} - 2 \, A c^{3}\right )} x^{3} + 9 \,{\left (B b^{2} c - 2 \, A b c^{2}\right )} x^{2} + 2 \,{\left (B b^{3} - 2 \, A b^{2} c\right )} x}{2 \,{\left (b^{4} c^{2} x^{4} + 2 \, b^{5} c x^{3} + b^{6} x^{2}\right )}} + \frac{3 \,{\left (B b c - 2 \, A c^{2}\right )} \log \left (c x + b\right )}{b^{5}} - \frac{3 \,{\left (B b c - 2 \, A c^{2}\right )} \log \left (x\right )}{b^{5}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((B*x+A)/(c*x^2+b*x)^3,x, algorithm="maxima")

[Out]

-1/2*(A*b^3 + 6*(B*b*c^2 - 2*A*c^3)*x^3 + 9*(B*b^2*c - 2*A*b*c^2)*x^2 + 2*(B*b^3 - 2*A*b^2*c)*x)/(b^4*c^2*x^4
+ 2*b^5*c*x^3 + b^6*x^2) + 3*(B*b*c - 2*A*c^2)*log(c*x + b)/b^5 - 3*(B*b*c - 2*A*c^2)*log(x)/b^5

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Fricas [B]  time = 1.52271, size = 467, normalized size = 4.28 \begin{align*} -\frac{A b^{4} + 6 \,{\left (B b^{2} c^{2} - 2 \, A b c^{3}\right )} x^{3} + 9 \,{\left (B b^{3} c - 2 \, A b^{2} c^{2}\right )} x^{2} + 2 \,{\left (B b^{4} - 2 \, A b^{3} c\right )} x - 6 \,{\left ({\left (B b c^{3} - 2 \, A c^{4}\right )} x^{4} + 2 \,{\left (B b^{2} c^{2} - 2 \, A b c^{3}\right )} x^{3} +{\left (B b^{3} c - 2 \, A b^{2} c^{2}\right )} x^{2}\right )} \log \left (c x + b\right ) + 6 \,{\left ({\left (B b c^{3} - 2 \, A c^{4}\right )} x^{4} + 2 \,{\left (B b^{2} c^{2} - 2 \, A b c^{3}\right )} x^{3} +{\left (B b^{3} c - 2 \, A b^{2} c^{2}\right )} x^{2}\right )} \log \left (x\right )}{2 \,{\left (b^{5} c^{2} x^{4} + 2 \, b^{6} c x^{3} + b^{7} x^{2}\right )}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((B*x+A)/(c*x^2+b*x)^3,x, algorithm="fricas")

[Out]

-1/2*(A*b^4 + 6*(B*b^2*c^2 - 2*A*b*c^3)*x^3 + 9*(B*b^3*c - 2*A*b^2*c^2)*x^2 + 2*(B*b^4 - 2*A*b^3*c)*x - 6*((B*
b*c^3 - 2*A*c^4)*x^4 + 2*(B*b^2*c^2 - 2*A*b*c^3)*x^3 + (B*b^3*c - 2*A*b^2*c^2)*x^2)*log(c*x + b) + 6*((B*b*c^3
- 2*A*c^4)*x^4 + 2*(B*b^2*c^2 - 2*A*b*c^3)*x^3 + (B*b^3*c - 2*A*b^2*c^2)*x^2)*log(x))/(b^5*c^2*x^4 + 2*b^6*c*
x^3 + b^7*x^2)

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Sympy [B]  time = 1.37443, size = 219, normalized size = 2.01 \begin{align*} - \frac{A b^{3} + x^{3} \left (- 12 A c^{3} + 6 B b c^{2}\right ) + x^{2} \left (- 18 A b c^{2} + 9 B b^{2} c\right ) + x \left (- 4 A b^{2} c + 2 B b^{3}\right )}{2 b^{6} x^{2} + 4 b^{5} c x^{3} + 2 b^{4} c^{2} x^{4}} - \frac{3 c \left (- 2 A c + B b\right ) \log{\left (x + \frac{- 6 A b c^{2} + 3 B b^{2} c - 3 b c \left (- 2 A c + B b\right )}{- 12 A c^{3} + 6 B b c^{2}} \right )}}{b^{5}} + \frac{3 c \left (- 2 A c + B b\right ) \log{\left (x + \frac{- 6 A b c^{2} + 3 B b^{2} c + 3 b c \left (- 2 A c + B b\right )}{- 12 A c^{3} + 6 B b c^{2}} \right )}}{b^{5}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((B*x+A)/(c*x**2+b*x)**3,x)

[Out]

-(A*b**3 + x**3*(-12*A*c**3 + 6*B*b*c**2) + x**2*(-18*A*b*c**2 + 9*B*b**2*c) + x*(-4*A*b**2*c + 2*B*b**3))/(2*
b**6*x**2 + 4*b**5*c*x**3 + 2*b**4*c**2*x**4) - 3*c*(-2*A*c + B*b)*log(x + (-6*A*b*c**2 + 3*B*b**2*c - 3*b*c*(
-2*A*c + B*b))/(-12*A*c**3 + 6*B*b*c**2))/b**5 + 3*c*(-2*A*c + B*b)*log(x + (-6*A*b*c**2 + 3*B*b**2*c + 3*b*c*
(-2*A*c + B*b))/(-12*A*c**3 + 6*B*b*c**2))/b**5

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Giac [A]  time = 1.24284, size = 167, normalized size = 1.53 \begin{align*} -\frac{3 \,{\left (B b c - 2 \, A c^{2}\right )} \log \left ({\left | x \right |}\right )}{b^{5}} + \frac{3 \,{\left (B b c^{2} - 2 \, A c^{3}\right )} \log \left ({\left | c x + b \right |}\right )}{b^{5} c} - \frac{6 \, B b c^{2} x^{3} - 12 \, A c^{3} x^{3} + 9 \, B b^{2} c x^{2} - 18 \, A b c^{2} x^{2} + 2 \, B b^{3} x - 4 \, A b^{2} c x + A b^{3}}{2 \,{\left (c x^{2} + b x\right )}^{2} b^{4}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((B*x+A)/(c*x^2+b*x)^3,x, algorithm="giac")

[Out]

-3*(B*b*c - 2*A*c^2)*log(abs(x))/b^5 + 3*(B*b*c^2 - 2*A*c^3)*log(abs(c*x + b))/(b^5*c) - 1/2*(6*B*b*c^2*x^3 -
12*A*c^3*x^3 + 9*B*b^2*c*x^2 - 18*A*b*c^2*x^2 + 2*B*b^3*x - 4*A*b^2*c*x + A*b^3)/((c*x^2 + b*x)^2*b^4)