\(\int \frac {\text {erfc}(d (a+b \log (c x^n)))}{x} \, dx\) [146]

Optimal result

Integrand size = 17, antiderivative size = 66 \[ \int \frac {\text {erfc}\left (d \left (a+b \log \left (c x^n\right )\right )\right )}{x} \, dx=-\frac {e^{-d^2 \left (a+b \log \left (c x^n\right )\right )^2}}{b d n \sqrt {\pi }}+\frac {\text {erfc}\left (d \left (a+b \log \left (c x^n\right )\right )\right ) \left (a+b \log \left (c x^n\right )\right )}{b n} \]

[Out]

erfc(d*(a+b*ln(c*x^n)))*(a+b*ln(c*x^n))/b/n-1/b/d/exp(d^2*(a+b*ln(c*x^n))^2)/n/Pi^(1/2)

Rubi [A] (verified)

Time = 0.03 (sec) , antiderivative size = 66, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 1, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.059, Rules used = {6485} \[ \int \frac {\text {erfc}\left (d \left (a+b \log \left (c x^n\right )\right )\right )}{x} \, dx=\frac {\left (a+b \log \left (c x^n\right )\right ) \text {erfc}\left (d \left (a+b \log \left (c x^n\right )\right )\right )}{b n}-\frac {e^{-d^2 \left (a+b \log \left (c x^n\right )\right )^2}}{\sqrt {\pi } b d n} \]

[In]

Int[Erfc[d*(a + b*Log[c*x^n])]/x,x]

[Out]

-(1/(b*d*E^(d^2*(a + b*Log[c*x^n])^2)*n*Sqrt[Pi])) + (Erfc[d*(a + b*Log[c*x^n])]*(a + b*Log[c*x^n]))/(b*n)

Rule 6485

Int[Erfc[(a_.) + (b_.)*(x_)], x_Symbol] :> Simp[(a + b*x)*(Erfc[a + b*x]/b), x] - Simp[1/(b*Sqrt[Pi]*E^(a + b*
x)^2), x] /; FreeQ[{a, b}, x]

Rubi steps \begin{align*} \text {integral}& = \frac {\text {Subst}\left (\int \text {erfc}(d (a+b x)) \, dx,x,\log \left (c x^n\right )\right )}{n} \\ & = \frac {\text {Subst}\left (\int \text {erfc}(x) \, dx,x,a d+b d \log \left (c x^n\right )\right )}{b d n} \\ & = -\frac {e^{-\left (a d+b d \log \left (c x^n\right )\right )^2}}{b d n \sqrt {\pi }}+\frac {\text {erfc}\left (a d+b d \log \left (c x^n\right )\right ) \left (a+b \log \left (c x^n\right )\right )}{b n} \\ \end{align*}

Mathematica [A] (verified)

Time = 0.10 (sec) , antiderivative size = 93, normalized size of antiderivative = 1.41 \[ \int \frac {\text {erfc}\left (d \left (a+b \log \left (c x^n\right )\right )\right )}{x} \, dx=\frac {-\frac {e^{-d^2 \left (a^2+b^2 \log ^2\left (c x^n\right )\right )} \left (c x^n\right )^{-2 a b d^2}}{b d \sqrt {\pi }}-\frac {a \text {erf}\left (d \left (a+b \log \left (c x^n\right )\right )\right )}{b}+\text {erfc}\left (d \left (a+b \log \left (c x^n\right )\right )\right ) \log \left (c x^n\right )}{n} \]

[In]

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

[Out]

(-(1/(b*d*E^(d^2*(a^2 + b^2*Log[c*x^n]^2))*Sqrt[Pi]*(c*x^n)^(2*a*b*d^2))) - (a*Erf[d*(a + b*Log[c*x^n])])/b +
Erfc[d*(a + b*Log[c*x^n])]*Log[c*x^n])/n

Maple [A] (verified)

Time = 1.14 (sec) , antiderivative size = 63, normalized size of antiderivative = 0.95

method	result	size
derivativedivides	\(\frac {\left (a d +b d \ln \left (c \,x^{n}\right )\right ) \operatorname {erfc}\left (a d +b d \ln \left (c \,x^{n}\right )\right )-\frac {{\mathrm e}^{-{\left (a d +b d \ln \left (c \,x^{n}\right )\right )}^{2}}}{\sqrt {\pi }}}{n d b}\)	\(63\)
default	\(\frac {\left (a d +b d \ln \left (c \,x^{n}\right )\right ) \operatorname {erfc}\left (a d +b d \ln \left (c \,x^{n}\right )\right )-\frac {{\mathrm e}^{-{\left (a d +b d \ln \left (c \,x^{n}\right )\right )}^{2}}}{\sqrt {\pi }}}{n d b}\)	\(63\)
parts	\(\ln \left (x \right ) \operatorname {erfc}\left (d \left (a +b \ln \left (c \,x^{n}\right )\right )\right )+\frac {2 d b n \left (-\frac {{\mathrm e}^{-\ln \left (x \right )^{2} b^{2} d^{2} n^{2}-2 d^{2} \left (b \left (\ln \left (c \,x^{n}\right )-n \ln \left (x \right )\right )+a \right ) n b \ln \left (x \right )-d^{2} {\left (b \left (\ln \left (c \,x^{n}\right )-n \ln \left (x \right )\right )+a \right )}^{2}}}{2 b^{2} d^{2} n^{2}}-\frac {\left (b \left (\ln \left (c \,x^{n}\right )-n \ln \left (x \right )\right )+a \right ) \sqrt {\pi }\, \operatorname {erf}\left (d b n \ln \left (x \right )+d \left (b \left (\ln \left (c \,x^{n}\right )-n \ln \left (x \right )\right )+a \right )\right )}{2 d \,n^{2} b^{2}}\right )}{\sqrt {\pi }}\)	\(159\)

[In]

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

[Out]

1/n/d/b*((a*d+b*d*ln(c*x^n))*erfc(a*d+b*d*ln(c*x^n))-1/Pi^(1/2)*exp(-(a*d+b*d*ln(c*x^n))^2))

Fricas [B] (verification not implemented)

Leaf count of result is larger than twice the leaf count of optimal. 128 vs. \(2 (63) = 126\).

Time = 0.25 (sec) , antiderivative size = 128, normalized size of antiderivative = 1.94 \[ \int \frac {\text {erfc}\left (d \left (a+b \log \left (c x^n\right )\right )\right )}{x} \, dx=\frac {\pi b d n \log \left (x\right ) - {\left (\pi b d n \log \left (x\right ) + \pi b d \log \left (c\right ) + \pi a d\right )} \operatorname {erf}\left (b d \log \left (c x^{n}\right ) + a d\right ) - \sqrt {\pi } e^{\left (-b^{2} d^{2} n^{2} \log \left (x\right )^{2} - b^{2} d^{2} \log \left (c\right )^{2} - 2 \, a b d^{2} \log \left (c\right ) - a^{2} d^{2} - 2 \, {\left (b^{2} d^{2} n \log \left (c\right ) + a b d^{2} n\right )} \log \left (x\right )\right )}}{\pi b d n} \]

[In]

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

[Out]

(pi*b*d*n*log(x) - (pi*b*d*n*log(x) + pi*b*d*log(c) + pi*a*d)*erf(b*d*log(c*x^n) + a*d) - sqrt(pi)*e^(-b^2*d^2
*n^2*log(x)^2 - b^2*d^2*log(c)^2 - 2*a*b*d^2*log(c) - a^2*d^2 - 2*(b^2*d^2*n*log(c) + a*b*d^2*n)*log(x)))/(pi*
b*d*n)

Sympy [F]

\[ \int \frac {\text {erfc}\left (d \left (a+b \log \left (c x^n\right )\right )\right )}{x} \, dx=\int \frac {\operatorname {erfc}{\left (a d + b d \log {\left (c x^{n} \right )} \right )}}{x}\, dx \]

[In]

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

[Out]

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

Maxima [A] (verification not implemented)

none

Time = 0.20 (sec) , antiderivative size = 59, normalized size of antiderivative = 0.89 \[ \int \frac {\text {erfc}\left (d \left (a+b \log \left (c x^n\right )\right )\right )}{x} \, dx=\frac {{\left (b \log \left (c x^{n}\right ) + a\right )} d \operatorname {erfc}\left ({\left (b \log \left (c x^{n}\right ) + a\right )} d\right ) - \frac {e^{\left (-{\left (b \log \left (c x^{n}\right ) + a\right )}^{2} d^{2}\right )}}{\sqrt {\pi }}}{b d n} \]

[In]

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

[Out]

((b*log(c*x^n) + a)*d*erfc((b*log(c*x^n) + a)*d) - e^(-(b*log(c*x^n) + a)^2*d^2)/sqrt(pi))/(b*d*n)

Giac [A] (verification not implemented)

none

Time = 0.27 (sec) , antiderivative size = 83, normalized size of antiderivative = 1.26 \[ \int \frac {\text {erfc}\left (d \left (a+b \log \left (c x^n\right )\right )\right )}{x} \, dx=\frac {b d n \log \left (x\right ) + b d \log \left (c\right ) + a d - {\left (b d n \log \left (x\right ) + b d \log \left (c\right ) + a d\right )} \operatorname {erf}\left (b d n \log \left (x\right ) + b d \log \left (c\right ) + a d\right ) - \frac {e^{\left (-{\left (b d n \log \left (x\right ) + b d \log \left (c\right ) + a d\right )}^{2}\right )}}{\sqrt {\pi }}}{b d n} \]

[In]

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

[Out]

(b*d*n*log(x) + b*d*log(c) + a*d - (b*d*n*log(x) + b*d*log(c) + a*d)*erf(b*d*n*log(x) + b*d*log(c) + a*d) - e^
(-(b*d*n*log(x) + b*d*log(c) + a*d)^2)/sqrt(pi))/(b*d*n)

Mupad [B] (verification not implemented)

Time = 5.06 (sec) , antiderivative size = 100, normalized size of antiderivative = 1.52 \[ \int \frac {\text {erfc}\left (d \left (a+b \log \left (c x^n\right )\right )\right )}{x} \, dx=\frac {\mathrm {erfc}\left (d\,\left (a+b\,\ln \left (c\,x^n\right )\right )\right )\,\ln \left (c\,x^n\right )}{n}+\frac {a\,\mathrm {erfc}\left (d\,\left (a+b\,\ln \left (c\,x^n\right )\right )\right )}{b\,n}-\frac {{\mathrm {e}}^{-b^2\,d^2\,{\ln \left (c\,x^n\right )}^2}\,{\mathrm {e}}^{-a^2\,d^2}}{b\,d\,n\,\sqrt {\pi }\,{\left (c\,x^n\right )}^{2\,a\,b\,d^2}} \]

[In]

int(erfc(d*(a + b*log(c*x^n)))/x,x)

[Out]

(erfc(d*(a + b*log(c*x^n)))*log(c*x^n))/n + (a*erfc(d*(a + b*log(c*x^n))))/(b*n) - (exp(-b^2*d^2*log(c*x^n)^2)
*exp(-a^2*d^2))/(b*d*n*pi^(1/2)*(c*x^n)^(2*a*b*d^2))