3.74.99 \(\int \frac {1-3 x}{x} \, dx\)

Optimal. Leaf size=14 \[ 4+e-3 x-\log (3)+\log (2 x) \]

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Rubi [A]  time = 0.00, antiderivative size = 6, normalized size of antiderivative = 0.43, number of steps used = 2, number of rules used = 1, integrand size = 9, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.111, Rules used = {43} \begin {gather*} \log (x)-3 x \end {gather*}

Antiderivative was successfully verified.

[In]

Int[(1 - 3*x)/x,x]

[Out]

-3*x + Log[x]

Rule 43

Int[((a_.) + (b_.)*(x_))^(m_.)*((c_.) + (d_.)*(x_))^(n_.), x_Symbol] :> Int[ExpandIntegrand[(a + b*x)^m*(c + d
*x)^n, x], x] /; FreeQ[{a, b, c, d, n}, x] && NeQ[b*c - a*d, 0] && IGtQ[m, 0] && ( !IntegerQ[n] || (EqQ[c, 0]
&& LeQ[7*m + 4*n + 4, 0]) || LtQ[9*m + 5*(n + 1), 0] || GtQ[m + n + 2, 0])

Rubi steps

\begin {gather*} \begin {aligned} \text {integral} &=\int \left (-3+\frac {1}{x}\right ) \, dx\\ &=-3 x+\log (x)\\ \end {aligned} \end {gather*}

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Mathematica [A]  time = 0.00, size = 6, normalized size = 0.43 \begin {gather*} -3 x+\log (x) \end {gather*}

Antiderivative was successfully verified.

[In]

Integrate[(1 - 3*x)/x,x]

[Out]

-3*x + Log[x]

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fricas [A]  time = 0.58, size = 6, normalized size = 0.43 \begin {gather*} -3 \, x + \log \relax (x) \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((-3*x+1)/x,x, algorithm="fricas")

[Out]

-3*x + log(x)

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giac [A]  time = 0.16, size = 7, normalized size = 0.50 \begin {gather*} -3 \, x + \log \left ({\left | x \right |}\right ) \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((-3*x+1)/x,x, algorithm="giac")

[Out]

-3*x + log(abs(x))

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maple [A]  time = 0.01, size = 7, normalized size = 0.50

method	result	size
default	\(\ln \relax (x )-3 x\)	\(7\)
norman	\(\ln \relax (x )-3 x\)	\(7\)
risch	\(\ln \relax (x )-3 x\)	\(7\)

Verification of antiderivative is not currently implemented for this CAS.

[In]

int((-3*x+1)/x,x,method=_RETURNVERBOSE)

[Out]

ln(x)-3*x

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maxima [A]  time = 0.36, size = 6, normalized size = 0.43 \begin {gather*} -3 \, x + \log \relax (x) \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((-3*x+1)/x,x, algorithm="maxima")

[Out]

-3*x + log(x)

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mupad [B]  time = 0.02, size = 6, normalized size = 0.43 \begin {gather*} \ln \relax (x)-3\,x \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(-(3*x - 1)/x,x)

[Out]

log(x) - 3*x

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sympy [A]  time = 0.07, size = 5, normalized size = 0.36 \begin {gather*} - 3 x + \log {\relax (x )} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((-3*x+1)/x,x)

[Out]

-3*x + log(x)

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