3.1.27 \(\int e^{-n x} (a+b e^{n x}) \, dx\) [27]

Optimal. Leaf size=16 \[ -\frac {a e^{-n x}}{n}+b x \]

[Out]

-a/exp(n*x)/n+b*x

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Rubi [A]
time = 0.01, antiderivative size = 16, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 2, integrand size = 16, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.125, Rules used = {2280, 45} \begin {gather*} b x-\frac {a e^{-n x}}{n} \end {gather*}

Antiderivative was successfully verified.

[In]

Int[(a + b*E^(n*x))/E^(n*x),x]

[Out]

-(a/(E^(n*x)*n)) + b*x

Rule 45

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])

Rule 2280

Int[((a_) + (b_.)*(F_)^((e_.)*((c_.) + (d_.)*(x_))))^(p_.)*(G_)^((h_.)*((f_.) + (g_.)*(x_))), x_Symbol] :> Wit
h[{m = FullSimplify[g*h*(Log[G]/(d*e*Log[F]))]}, Dist[Denominator[m]*(G^(f*h - c*g*(h/d))/(d*e*Log[F])), Subst
[Int[x^(Numerator[m] - 1)*(a + b*x^Denominator[m])^p, x], x, F^(e*((c + d*x)/Denominator[m]))], x] /; LeQ[m, -
1] || GeQ[m, 1]] /; FreeQ[{F, G, a, b, c, d, e, f, g, h, p}, x]

Rubi steps

\begin {align*} \int e^{-n x} \left (a+b e^{n x}\right ) \, dx &=\frac {\text {Subst}\left (\int \frac {a+b x}{x^2} \, dx,x,e^{n x}\right )}{n}\\ &=\frac {\text {Subst}\left (\int \left (\frac {a}{x^2}+\frac {b}{x}\right ) \, dx,x,e^{n x}\right )}{n}\\ &=-\frac {a e^{-n x}}{n}+b x\\ \end {align*}

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Mathematica [A]
time = 0.01, size = 16, normalized size = 1.00 \begin {gather*} -\frac {a e^{-n x}}{n}+b x \end {gather*}

Antiderivative was successfully verified.

[In]

Integrate[(a + b*E^(n*x))/E^(n*x),x]

[Out]

-(a/(E^(n*x)*n)) + b*x

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Maple [A]
time = 0.01, size = 22, normalized size = 1.38

method	result	size
risch	\(-\frac {a \,{\mathrm e}^{-n x}}{n}+b x\)	\(16\)
derivativedivides	\(\frac {-a \,{\mathrm e}^{-n x}+b \ln \left ({\mathrm e}^{n x}\right )}{n}\)	\(22\)
default	\(\frac {-a \,{\mathrm e}^{-n x}+b \ln \left ({\mathrm e}^{n x}\right )}{n}\)	\(22\)
norman	\(\left (b x \,{\mathrm e}^{n x}-\frac {a}{n}\right ) {\mathrm e}^{-n x}\)	\(22\)

Verification of antiderivative is not currently implemented for this CAS.

[In]

int((a+b*exp(n*x))/exp(n*x),x,method=_RETURNVERBOSE)

[Out]

1/n*(-a/exp(n*x)+b*ln(exp(n*x)))

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Maxima [A]
time = 0.30, size = 15, normalized size = 0.94 \begin {gather*} b x - \frac {a e^{\left (-n x\right )}}{n} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((a+b*exp(n*x))/exp(n*x),x, algorithm="maxima")

[Out]

b*x - a*e^(-n*x)/n

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Fricas [A]
time = 0.34, size = 21, normalized size = 1.31 \begin {gather*} \frac {{\left (b n x e^{\left (n x\right )} - a\right )} e^{\left (-n x\right )}}{n} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((a+b*exp(n*x))/exp(n*x),x, algorithm="fricas")

[Out]

(b*n*x*e^(n*x) - a)*e^(-n*x)/n

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Sympy [A]
time = 0.05, size = 15, normalized size = 0.94 \begin {gather*} b x + \begin {cases} - \frac {a e^{- n x}}{n} & \text {for}\: n \neq 0 \\a x & \text {otherwise} \end {cases} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((a+b*exp(n*x))/exp(n*x),x)

[Out]

b*x + Piecewise((-a*exp(-n*x)/n, Ne(n, 0)), (a*x, True))

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Giac [A]
time = 2.32, size = 15, normalized size = 0.94 \begin {gather*} b x - \frac {a e^{\left (-n x\right )}}{n} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((a+b*exp(n*x))/exp(n*x),x, algorithm="giac")

[Out]

b*x - a*e^(-n*x)/n

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Mupad [B]
time = 0.08, size = 15, normalized size = 0.94 \begin {gather*} b\,x-\frac {a\,{\mathrm {e}}^{-n\,x}}{n} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(exp(-n*x)*(a + b*exp(n*x)),x)

[Out]

b*x - (a*exp(-n*x))/n

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