3.618 \(\int \frac {\log ^n(x)}{x} \, dx\)

Optimal. Leaf size=12 \[ \frac {\log ^{n+1}(x)}{n+1} \]

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Rubi [A]  time = 0.02, antiderivative size = 12, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, integrand size = 8, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.250, Rules used = {2302, 30} \[ \frac {\log ^{n+1}(x)}{n+1} \]

Antiderivative was successfully verified.

[In]

Int[Log[x]^n/x,x]

[Out]

Log[x]^(1 + n)/(1 + n)

Rule 30

Int[(x_)^(m_.), x_Symbol] :> Simp[x^(m + 1)/(m + 1), x] /; FreeQ[m, x] && NeQ[m, -1]

Rule 2302

Int[((a_.) + Log[(c_.)*(x_)^(n_.)]*(b_.))^(p_.)/(x_), x_Symbol] :> Dist[1/(b*n), Subst[Int[x^p, x], x, a + b*L
og[c*x^n]], x] /; FreeQ[{a, b, c, n, p}, x]

Rubi steps

\begin {align*} \int \frac {\log ^n(x)}{x} \, dx &=\operatorname {Subst}\left (\int x^n \, dx,x,\log (x)\right )\\ &=\frac {\log ^{1+n}(x)}{1+n}\\ \end {align*}

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Mathematica [A]  time = 0.00, size = 12, normalized size = 1.00 \[ \frac {\log ^{n+1}(x)}{n+1} \]

Antiderivative was successfully verified.

[In]

Integrate[Log[x]^n/x,x]

[Out]

Log[x]^(1 + n)/(1 + n)

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IntegrateAlgebraic [F]  time = 0.00, size = 0, normalized size = 0.00 \[ \int \frac {\log ^n(x)}{x} \, dx \]

Verification is Not applicable to the result.

[In]

IntegrateAlgebraic[Log[x]^n/x,x]

[Out]

Could not integrate

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fricas [A]  time = 1.05, size = 12, normalized size = 1.00 \[ \frac {\log \relax (x)^{n} \log \relax (x)}{n + 1} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(log(x)^n/x,x, algorithm="fricas")

[Out]

log(x)^n*log(x)/(n + 1)

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giac [A]  time = 0.61, size = 12, normalized size = 1.00 \[ \frac {\log \relax (x)^{n + 1}}{n + 1} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(log(x)^n/x,x, algorithm="giac")

[Out]

log(x)^(n + 1)/(n + 1)

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maple [A]  time = 0.03, size = 13, normalized size = 1.08

method	result	size
derivativedivides	\(\frac {\ln \relax (x )^{1+n}}{1+n}\)	\(13\)
default	\(\frac {\ln \relax (x )^{1+n}}{1+n}\)	\(13\)
risch	\(\frac {\ln \relax (x ) \ln \relax (x )^{n}}{1+n}\)	\(13\)
norman	\(\frac {\ln \relax (x ) {\mathrm e}^{n \ln \left (\ln \relax (x )\right )}}{1+n}\)	\(15\)

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(ln(x)^n/x,x,method=_RETURNVERBOSE)

[Out]

ln(x)^(1+n)/(1+n)

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maxima [A]  time = 0.42, size = 12, normalized size = 1.00 \[ \frac {\log \relax (x)^{n + 1}}{n + 1} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(log(x)^n/x,x, algorithm="maxima")

[Out]

log(x)^(n + 1)/(n + 1)

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mupad [B]  time = 0.33, size = 22, normalized size = 1.83 \[ \left \{\begin {array}{cl} \ln \left (\ln \relax (x)\right ) & \text {\ if\ \ }n=-1\\ \frac {{\ln \relax (x)}^{n+1}}{n+1} & \text {\ if\ \ }n\neq -1 \end {array}\right . \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(log(x)^n/x,x)

[Out]

piecewise(n == -1, log(log(x)), n ~= -1, log(x)^(n + 1)/(n + 1))

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sympy [A]  time = 0.89, size = 15, normalized size = 1.25 \[ \begin {cases} \frac {\log {\relax (x )}^{n + 1}}{n + 1} & \text {for}\: n \neq -1 \\\log {\left (\log {\relax (x )} \right )} & \text {otherwise} \end {cases} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(ln(x)**n/x,x)

[Out]

Piecewise((log(x)**(n + 1)/(n + 1), Ne(n, -1)), (log(log(x)), True))

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