3.3.48 \(\int \text {Erfi}(d (a+b \log (c x^n))) \, dx\) [248]

Optimal. Leaf size=91 \[ x \text {Erfi}\left (d \left (a+b \log \left (c x^n\right )\right )\right )-e^{-\frac {1+4 a b d^2 n}{4 b^2 d^2 n^2}} x \left (c x^n\right )^{-1/n} \text {Erfi}\left (\frac {2 a b d^2+\frac {1}{n}+2 b^2 d^2 \log \left (c x^n\right )}{2 b d}\right ) \]

[Out]

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

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Rubi [A]
time = 0.09, antiderivative size = 91, normalized size of antiderivative = 1.00, number of steps used = 5, number of rules used = 5, integrand size = 13, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.385, Rules used = {6534, 2312, 2308, 2266, 2235} \begin {gather*} x \text {Erfi}\left (d \left (a+b \log \left (c x^n\right )\right )\right )-x \left (c x^n\right )^{-1/n} e^{-\frac {4 a b d^2 n+1}{4 b^2 d^2 n^2}} \text {Erfi}\left (\frac {2 a b d^2+2 b^2 d^2 \log \left (c x^n\right )+\frac {1}{n}}{2 b d}\right ) \end {gather*}

Antiderivative was successfully verified.

[In]

Int[Erfi[d*(a + b*Log[c*x^n])],x]

[Out]

x*Erfi[d*(a + b*Log[c*x^n])] - (x*Erfi[(2*a*b*d^2 + n^(-1) + 2*b^2*d^2*Log[c*x^n])/(2*b*d)])/(E^((1 + 4*a*b*d^
2*n)/(4*b^2*d^2*n^2))*(c*x^n)^n^(-1))

Rule 2235

Int[(F_)^((a_.) + (b_.)*((c_.) + (d_.)*(x_))^2), x_Symbol] :> Simp[F^a*Sqrt[Pi]*(Erfi[(c + d*x)*Rt[b*Log[F], 2
]]/(2*d*Rt[b*Log[F], 2])), x] /; FreeQ[{F, a, b, c, d}, x] && PosQ[b]

Rule 2266

Int[(F_)^((a_.) + (b_.)*(x_) + (c_.)*(x_)^2), x_Symbol] :> Dist[F^(a - b^2/(4*c)), Int[F^((b + 2*c*x)^2/(4*c))
, x], x] /; FreeQ[{F, a, b, c}, x]

Rule 2308

Int[(F_)^(((a_.) + Log[(c_.)*((d_.) + (e_.)*(x_))^(n_.)]^2*(b_.))*(f_.))*((g_.) + (h_.)*(x_))^(m_.), x_Symbol]
:> Dist[(g + h*x)^(m + 1)/(h*n*(c*(d + e*x)^n)^((m + 1)/n)), Subst[Int[E^(a*f*Log[F] + ((m + 1)*x)/n + b*f*Lo
g[F]*x^2), x], x, Log[c*(d + e*x)^n]], x] /; FreeQ[{F, a, b, c, d, e, f, g, h, m, n}, x] && EqQ[e*g - d*h, 0]

Rule 2312

Int[(F_)^(((a_.) + Log[(c_.)*((d_.) + (e_.)*(x_))^(n_.)]*(b_.))^2*(f_.)), x_Symbol] :> Dist[(c*(d + e*x)^n)^(2
*a*b*f*Log[F])/(d + e*x)^(2*a*b*f*n*Log[F]), Int[(d + e*x)^(2*a*b*f*n*Log[F])*F^(a^2*f + b^2*f*Log[c*(d + e*x)
^n]^2), x], x] /; FreeQ[{F, a, b, c, d, e, f, n}, x] &&  !IntegerQ[2*a*b*f*Log[F]]

Rule 6534

Int[Erfi[((a_.) + Log[(c_.)*(x_)^(n_.)]*(b_.))*(d_.)], x_Symbol] :> Simp[x*Erfi[d*(a + b*Log[c*x^n])], x] - Di
st[2*b*d*(n/Sqrt[Pi]), Int[E^(d*(a + b*Log[c*x^n]))^2, x], x] /; FreeQ[{a, b, c, d, n}, x]

Rubi steps

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

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Mathematica [A]
time = 0.19, size = 78, normalized size = 0.86 \begin {gather*} x \text {Erfi}\left (d \left (a+b \log \left (c x^n\right )\right )\right )-e^{-\frac {\frac {\frac {1}{d^2}+4 a b n}{b^2}+4 n \log \left (c x^n\right )}{4 n^2}} x \text {Erfi}\left (a d+\frac {1}{2 b d n}+b d \log \left (c x^n\right )\right ) \end {gather*}

Antiderivative was successfully verified.

[In]

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

[Out]

x*Erfi[d*(a + b*Log[c*x^n])] - (x*Erfi[a*d + 1/(2*b*d*n) + b*d*Log[c*x^n]])/E^(((d^(-2) + 4*a*b*n)/b^2 + 4*n*L
og[c*x^n])/(4*n^2))

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Maple [F]
time = 0.06, size = 0, normalized size = 0.00 \[\int \erfi \left (d \left (a +b \ln \left (c \,x^{n}\right )\right )\right )\, dx\]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(erfi(d*(a+b*ln(c*x^n))),x)

[Out]

int(erfi(d*(a+b*ln(c*x^n))),x)

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

[Out]

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

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Fricas [A]
time = 0.36, size = 122, normalized size = 1.34 \begin {gather*} -\sqrt {b^{2} d^{2} n^{2}} \operatorname {erfi}\left (\frac {{\left (2 \, b^{2} d^{2} n^{2} \log \left (x\right ) + 2 \, b^{2} d^{2} n \log \left (c\right ) + 2 \, a b d^{2} n + 1\right )} \sqrt {b^{2} d^{2} n^{2}}}{2 \, b^{2} d^{2} n^{2}}\right ) e^{\left (-\frac {4 \, b^{2} d^{2} n \log \left (c\right ) + 4 \, a b d^{2} n + 1}{4 \, b^{2} d^{2} n^{2}}\right )} + x \operatorname {erfi}\left (b d \log \left (c x^{n}\right ) + a d\right ) \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

-sqrt(b^2*d^2*n^2)*erfi(1/2*(2*b^2*d^2*n^2*log(x) + 2*b^2*d^2*n*log(c) + 2*a*b*d^2*n + 1)*sqrt(b^2*d^2*n^2)/(b
^2*d^2*n^2))*e^(-1/4*(4*b^2*d^2*n*log(c) + 4*a*b*d^2*n + 1)/(b^2*d^2*n^2)) + x*erfi(b*d*log(c*x^n) + a*d)

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

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

Integral(erfi(d*(a + b*log(c*x**n))), 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(erfi(d*(a+b*log(c*x^n))),x, algorithm="giac")

[Out]

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

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

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(erfi(d*(a + b*log(c*x^n))),x)

[Out]

int(erfi(d*(a + b*log(c*x^n))), x)

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