3.1.76 \(\int \frac {\log (d (a+b x+c x^2)^n)}{x} \, dx\) [76]

Optimal. Leaf size=129 \[ -n \log (x) \log \left (1+\frac {2 c x}{b-\sqrt {b^2-4 a c}}\right )-n \log (x) \log \left (1+\frac {2 c x}{b+\sqrt {b^2-4 a c}}\right )+\log (x) \log \left (d \left (a+b x+c x^2\right )^n\right )-n \text {Li}_2\left (-\frac {2 c x}{b-\sqrt {b^2-4 a c}}\right )-n \text {Li}_2\left (-\frac {2 c x}{b+\sqrt {b^2-4 a c}}\right ) \]

[Out]

ln(x)*ln(d*(c*x^2+b*x+a)^n)-n*ln(x)*ln(1+2*c*x/(b-(-4*a*c+b^2)^(1/2)))-n*ln(x)*ln(1+2*c*x/(b+(-4*a*c+b^2)^(1/2
)))-n*polylog(2,-2*c*x/(b-(-4*a*c+b^2)^(1/2)))-n*polylog(2,-2*c*x/(b+(-4*a*c+b^2)^(1/2)))

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Rubi [A]
time = 0.12, antiderivative size = 129, normalized size of antiderivative = 1.00, number of steps used = 7, number of rules used = 4, integrand size = 19, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.210, Rules used = {2604, 2404, 2354, 2438} \begin {gather*} -n \text {PolyLog}\left (2,-\frac {2 c x}{b-\sqrt {b^2-4 a c}}\right )-n \text {PolyLog}\left (2,-\frac {2 c x}{\sqrt {b^2-4 a c}+b}\right )-n \log (x) \log \left (\frac {2 c x}{b-\sqrt {b^2-4 a c}}+1\right )-n \log (x) \log \left (\frac {2 c x}{\sqrt {b^2-4 a c}+b}+1\right )+\log (x) \log \left (d \left (a+b x+c x^2\right )^n\right ) \end {gather*}

Antiderivative was successfully verified.

[In]

Int[Log[d*(a + b*x + c*x^2)^n]/x,x]

[Out]

-(n*Log[x]*Log[1 + (2*c*x)/(b - Sqrt[b^2 - 4*a*c])]) - n*Log[x]*Log[1 + (2*c*x)/(b + Sqrt[b^2 - 4*a*c])] + Log
[x]*Log[d*(a + b*x + c*x^2)^n] - n*PolyLog[2, (-2*c*x)/(b - Sqrt[b^2 - 4*a*c])] - n*PolyLog[2, (-2*c*x)/(b + S
qrt[b^2 - 4*a*c])]

Rule 2354

Int[((a_.) + Log[(c_.)*(x_)^(n_.)]*(b_.))^(p_.)/((d_) + (e_.)*(x_)), x_Symbol] :> Simp[Log[1 + e*(x/d)]*((a +
b*Log[c*x^n])^p/e), x] - Dist[b*n*(p/e), Int[Log[1 + e*(x/d)]*((a + b*Log[c*x^n])^(p - 1)/x), x], x] /; FreeQ[
{a, b, c, d, e, n}, x] && IGtQ[p, 0]

Rule 2404

Int[((a_.) + Log[(c_.)*(x_)^(n_.)]*(b_.))^(p_.)*(RFx_), x_Symbol] :> With[{u = ExpandIntegrand[(a + b*Log[c*x^
n])^p, RFx, x]}, Int[u, x] /; SumQ[u]] /; FreeQ[{a, b, c, n}, x] && RationalFunctionQ[RFx, x] && IGtQ[p, 0]

Rule 2438

Int[Log[(c_.)*((d_) + (e_.)*(x_)^(n_.))]/(x_), x_Symbol] :> Simp[-PolyLog[2, (-c)*e*x^n]/n, x] /; FreeQ[{c, d,
e, n}, x] && EqQ[c*d, 1]

Rule 2604

Int[((a_.) + Log[(c_.)*(RFx_)^(p_.)]*(b_.))^(n_.)/((d_.) + (e_.)*(x_)), x_Symbol] :> Simp[Log[d + e*x]*((a + b
*Log[c*RFx^p])^n/e), x] - Dist[b*n*(p/e), Int[Log[d + e*x]*(a + b*Log[c*RFx^p])^(n - 1)*(D[RFx, x]/RFx), x], x
] /; FreeQ[{a, b, c, d, e, p}, x] && RationalFunctionQ[RFx, x] && IGtQ[n, 0]

Rubi steps

\begin {align*} \int \frac {\log \left (d \left (a+b x+c x^2\right )^n\right )}{x} \, dx &=\log (x) \log \left (d \left (a+b x+c x^2\right )^n\right )-n \int \frac {(b+2 c x) \log (x)}{a+b x+c x^2} \, dx\\ &=\log (x) \log \left (d \left (a+b x+c x^2\right )^n\right )-n \int \left (\frac {2 c \log (x)}{b-\sqrt {b^2-4 a c}+2 c x}+\frac {2 c \log (x)}{b+\sqrt {b^2-4 a c}+2 c x}\right ) \, dx\\ &=\log (x) \log \left (d \left (a+b x+c x^2\right )^n\right )-(2 c n) \int \frac {\log (x)}{b-\sqrt {b^2-4 a c}+2 c x} \, dx-(2 c n) \int \frac {\log (x)}{b+\sqrt {b^2-4 a c}+2 c x} \, dx\\ &=-n \log (x) \log \left (1+\frac {2 c x}{b-\sqrt {b^2-4 a c}}\right )-n \log (x) \log \left (1+\frac {2 c x}{b+\sqrt {b^2-4 a c}}\right )+\log (x) \log \left (d \left (a+b x+c x^2\right )^n\right )+n \int \frac {\log \left (1+\frac {2 c x}{b-\sqrt {b^2-4 a c}}\right )}{x} \, dx+n \int \frac {\log \left (1+\frac {2 c x}{b+\sqrt {b^2-4 a c}}\right )}{x} \, dx\\ &=-n \log (x) \log \left (1+\frac {2 c x}{b-\sqrt {b^2-4 a c}}\right )-n \log (x) \log \left (1+\frac {2 c x}{b+\sqrt {b^2-4 a c}}\right )+\log (x) \log \left (d \left (a+b x+c x^2\right )^n\right )-n \text {Li}_2\left (-\frac {2 c x}{b-\sqrt {b^2-4 a c}}\right )-n \text {Li}_2\left (-\frac {2 c x}{b+\sqrt {b^2-4 a c}}\right )\\ \end {align*}

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Mathematica [A]
time = 0.12, size = 156, normalized size = 1.21 \begin {gather*} -n \log (x) \log \left (\frac {b-\sqrt {b^2-4 a c}+2 c x}{b-\sqrt {b^2-4 a c}}\right )-n \log (x) \log \left (\frac {b+\sqrt {b^2-4 a c}+2 c x}{b+\sqrt {b^2-4 a c}}\right )+\log (x) \log \left (d (a+x (b+c x))^n\right )-n \text {Li}_2\left (-\frac {2 c x}{b-\sqrt {b^2-4 a c}}\right )-n \text {Li}_2\left (-\frac {2 c x}{b+\sqrt {b^2-4 a c}}\right ) \end {gather*}

Antiderivative was successfully verified.

[In]

Integrate[Log[d*(a + b*x + c*x^2)^n]/x,x]

[Out]

-(n*Log[x]*Log[(b - Sqrt[b^2 - 4*a*c] + 2*c*x)/(b - Sqrt[b^2 - 4*a*c])]) - n*Log[x]*Log[(b + Sqrt[b^2 - 4*a*c]
+ 2*c*x)/(b + Sqrt[b^2 - 4*a*c])] + Log[x]*Log[d*(a + x*(b + c*x))^n] - n*PolyLog[2, (-2*c*x)/(b - Sqrt[b^2 -
4*a*c])] - n*PolyLog[2, (-2*c*x)/(b + Sqrt[b^2 - 4*a*c])]

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Maple [C] Result contains higher order function than in optimal. Order 9 vs. order 4.
time = 0.04, size = 315, normalized size = 2.44

method	result	size
risch	\(\ln \left (x \right ) \ln \left (\left (c \,x^{2}+b x +a \right )^{n}\right )-\ln \left (\frac {-b -2 c x +\sqrt {-4 a c +b^{2}}}{-b +\sqrt {-4 a c +b^{2}}}\right ) \ln \left (x \right ) n -\ln \left (\frac {b +2 c x +\sqrt {-4 a c +b^{2}}}{b +\sqrt {-4 a c +b^{2}}}\right ) \ln \left (x \right ) n -\dilog \left (\frac {-b -2 c x +\sqrt {-4 a c +b^{2}}}{-b +\sqrt {-4 a c +b^{2}}}\right ) n -\dilog \left (\frac {b +2 c x +\sqrt {-4 a c +b^{2}}}{b +\sqrt {-4 a c +b^{2}}}\right ) n -\frac {i \ln \left (x \right ) \pi \,\mathrm {csgn}\left (i d \right ) \mathrm {csgn}\left (i \left (c \,x^{2}+b x +a \right )^{n}\right ) \mathrm {csgn}\left (i d \left (c \,x^{2}+b x +a \right )^{n}\right )}{2}+\frac {i \ln \left (x \right ) \pi \,\mathrm {csgn}\left (i d \right ) \mathrm {csgn}\left (i d \left (c \,x^{2}+b x +a \right )^{n}\right )^{2}}{2}+\frac {i \ln \left (x \right ) \pi \,\mathrm {csgn}\left (i \left (c \,x^{2}+b x +a \right )^{n}\right ) \mathrm {csgn}\left (i d \left (c \,x^{2}+b x +a \right )^{n}\right )^{2}}{2}-\frac {i \ln \left (x \right ) \pi \mathrm {csgn}\left (i d \left (c \,x^{2}+b x +a \right )^{n}\right )^{3}}{2}+\ln \left (x \right ) \ln \left (d \right )\)	\(315\)

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(ln(d*(c*x^2+b*x+a)^n)/x,x,method=_RETURNVERBOSE)

[Out]

ln(x)*ln((c*x^2+b*x+a)^n)-ln((-b-2*c*x+(-4*a*c+b^2)^(1/2))/(-b+(-4*a*c+b^2)^(1/2)))*ln(x)*n-ln((b+2*c*x+(-4*a*
c+b^2)^(1/2))/(b+(-4*a*c+b^2)^(1/2)))*ln(x)*n-dilog((-b-2*c*x+(-4*a*c+b^2)^(1/2))/(-b+(-4*a*c+b^2)^(1/2)))*n-d
ilog((b+2*c*x+(-4*a*c+b^2)^(1/2))/(b+(-4*a*c+b^2)^(1/2)))*n-1/2*I*ln(x)*Pi*csgn(I*d)*csgn(I*(c*x^2+b*x+a)^n)*c
sgn(I*d*(c*x^2+b*x+a)^n)+1/2*I*ln(x)*Pi*csgn(I*d)*csgn(I*d*(c*x^2+b*x+a)^n)^2+1/2*I*ln(x)*Pi*csgn(I*(c*x^2+b*x
+a)^n)*csgn(I*d*(c*x^2+b*x+a)^n)^2-1/2*I*ln(x)*Pi*csgn(I*d*(c*x^2+b*x+a)^n)^3+ln(x)*ln(d)

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Maxima [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {Failed to integrate} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

integrate(log((c*x^2 + b*x + a)^n*d)/x, x)

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Fricas [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {could not integrate} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

integral(log((c*x^2 + b*x + a)^n*d)/x, x)

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Sympy [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \int \frac {\log {\left (d \left (a + b x + c x^{2}\right )^{n} \right )}}{x}\, dx \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(ln(d*(c*x**2+b*x+a)**n)/x,x)

[Out]

Integral(log(d*(a + b*x + c*x**2)**n)/x, x)

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Giac [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {could not integrate} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

integrate(log((c*x^2 + b*x + a)^n*d)/x, x)

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Mupad [F]
time = 0.00, size = -1, normalized size = -0.01 \begin {gather*} \int \frac {\ln \left (d\,{\left (c\,x^2+b\,x+a\right )}^n\right )}{x} \,d x \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(log(d*(a + b*x + c*x^2)^n)/x,x)

[Out]

int(log(d*(a + b*x + c*x^2)^n)/x, x)

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