3.1.49 \(\int \frac {e^{-2 i \text {ArcTan}(a x)}}{x^2} \, dx\) [49]

Optimal. Leaf size=27 \[ -\frac {1}{x}-2 i a \log (x)+2 i a \log (i-a x) \]

[Out]

-1/x-2*I*a*ln(x)+2*I*a*ln(I-a*x)

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Rubi [A]
time = 0.02, antiderivative size = 27, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 2, integrand size = 14, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.143, Rules used = {5170, 78} \begin {gather*} -2 i a \log (x)+2 i a \log (-a x+i)-\frac {1}{x} \end {gather*}

Antiderivative was successfully verified.

[In]

Int[1/(E^((2*I)*ArcTan[a*x])*x^2),x]

[Out]

-x^(-1) - (2*I)*a*Log[x] + (2*I)*a*Log[I - a*x]

Rule 78

Int[((a_.) + (b_.)*(x_))*((c_) + (d_.)*(x_))^(n_.)*((e_.) + (f_.)*(x_))^(p_.), x_Symbol] :> Int[ExpandIntegran
d[(a + b*x)*(c + d*x)^n*(e + f*x)^p, x], x] /; FreeQ[{a, b, c, d, e, f, n}, x] && NeQ[b*c - a*d, 0] && ((ILtQ[
n, 0] && ILtQ[p, 0]) || EqQ[p, 1] || (IGtQ[p, 0] && ( !IntegerQ[n] || LeQ[9*p + 5*(n + 2), 0] || GeQ[n + p + 1
, 0] || (GeQ[n + p + 2, 0] && RationalQ[a, b, c, d, e, f]))))

Rule 5170

Int[E^(ArcTan[(a_.)*(x_)]*(n_.))*(x_)^(m_.), x_Symbol] :> Int[x^m*((1 - I*a*x)^(I*(n/2))/(1 + I*a*x)^(I*(n/2))
), x] /; FreeQ[{a, m, n}, x] &&  !IntegerQ[(I*n - 1)/2]

Rubi steps

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

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Mathematica [A]
time = 0.01, size = 27, normalized size = 1.00 \begin {gather*} -\frac {1}{x}-2 i a \log (x)+2 i a \log (i-a x) \end {gather*}

Antiderivative was successfully verified.

[In]

Integrate[1/(E^((2*I)*ArcTan[a*x])*x^2),x]

[Out]

-x^(-1) - (2*I)*a*Log[x] + (2*I)*a*Log[I - a*x]

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Maple [A]
time = 0.10, size = 25, normalized size = 0.93

method	result	size
default	\(-\frac {1}{x}-2 i a \ln \left (x \right )+2 i a \ln \left (-a x +i\right )\)	\(25\)
risch	\(-\frac {1}{x}-2 i a \ln \left (x \right )-2 a \arctan \left (a x \right )+i a \ln \left (a^{2} x^{2}+1\right )\)	\(34\)
meijerg	\(\frac {a^{2} x}{i a x +1}+i a \left (\frac {3 i a x}{3 i a x +3}+2 \ln \left (i a x +1\right )-1-2 \ln \left (x \right )-2 \ln \left (i a \right )+\frac {i}{x a}\right )\)	\(66\)

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(1/(1+I*a*x)^2*(a^2*x^2+1)/x^2,x,method=_RETURNVERBOSE)

[Out]

-1/x-2*I*a*ln(x)+2*I*a*ln(I-a*x)

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Maxima [A]
time = 0.26, size = 34, normalized size = 1.26 \begin {gather*} 2 i \, a \log \left (i \, a x + 1\right ) - 2 i \, a \log \left (x\right ) - \frac {a x - i}{a x^{2} - i \, x} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(1/(1+I*a*x)^2*(a^2*x^2+1)/x^2,x, algorithm="maxima")

[Out]

2*I*a*log(I*a*x + 1) - 2*I*a*log(x) - (a*x - I)/(a*x^2 - I*x)

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Fricas [A]
time = 2.19, size = 26, normalized size = 0.96 \begin {gather*} \frac {-2 i \, a x \log \left (x\right ) + 2 i \, a x \log \left (\frac {a x - i}{a}\right ) - 1}{x} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(1/(1+I*a*x)^2*(a^2*x^2+1)/x^2,x, algorithm="fricas")

[Out]

(-2*I*a*x*log(x) + 2*I*a*x*log((a*x - I)/a) - 1)/x

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Sympy [A]
time = 0.08, size = 32, normalized size = 1.19 \begin {gather*} - 2 a \left (i \log {\left (4 a^{2} x \right )} - i \log {\left (4 a^{2} x - 4 i a \right )}\right ) - \frac {1}{x} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(1/(1+I*a*x)**2*(a**2*x**2+1)/x**2,x)

[Out]

-2*a*(I*log(4*a**2*x) - I*log(4*a**2*x - 4*I*a)) - 1/x

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Giac [A]
time = 0.41, size = 34, normalized size = 1.26 \begin {gather*} -2 i \, a \log \left (\frac {i}{i \, a x + 1} - i\right ) - \frac {a}{\frac {i}{i \, a x + 1} - i} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(1/(1+I*a*x)^2*(a^2*x^2+1)/x^2,x, algorithm="giac")

[Out]

-2*I*a*log(I/(I*a*x + 1) - I) - a/(I/(I*a*x + 1) - I)

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Mupad [B]
time = 0.42, size = 17, normalized size = 0.63 \begin {gather*} -4\,a\,\mathrm {atan}\left (2\,a\,x-\mathrm {i}\right )-\frac {1}{x} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int((a^2*x^2 + 1)/(x^2*(a*x*1i + 1)^2),x)

[Out]

- 4*a*atan(2*a*x - 1i) - 1/x

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