3.456 \(\int (d+e x+f \sqrt {a+\frac {e^2 x^2}{f^2}}) \, dx\)

Optimal. Leaf size=68 \[ \frac {1}{2} f x \sqrt {a+\frac {e^2 x^2}{f^2}}+\frac {a f^2 \tanh ^{-1}\left (\frac {e x}{f \sqrt {a+\frac {e^2 x^2}{f^2}}}\right )}{2 e}+d x+\frac {e x^2}{2} \]

[Out]

d*x+1/2*e*x^2+1/2*a*f^2*arctanh(e*x/f/(a+e^2*x^2/f^2)^(1/2))/e+1/2*f*x*(a+e^2*x^2/f^2)^(1/2)

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Rubi [A]  time = 0.03, antiderivative size = 68, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 3, integrand size = 23, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.130, Rules used = {195, 217, 206} \[ \frac {1}{2} f x \sqrt {a+\frac {e^2 x^2}{f^2}}+\frac {a f^2 \tanh ^{-1}\left (\frac {e x}{f \sqrt {a+\frac {e^2 x^2}{f^2}}}\right )}{2 e}+d x+\frac {e x^2}{2} \]

Antiderivative was successfully verified.

[In]

Int[d + e*x + f*Sqrt[a + (e^2*x^2)/f^2],x]

[Out]

d*x + (e*x^2)/2 + (f*x*Sqrt[a + (e^2*x^2)/f^2])/2 + (a*f^2*ArcTanh[(e*x)/(f*Sqrt[a + (e^2*x^2)/f^2])])/(2*e)

Rule 195

Int[((a_) + (b_.)*(x_)^(n_))^(p_), x_Symbol] :> Simp[(x*(a + b*x^n)^p)/(n*p + 1), x] + Dist[(a*n*p)/(n*p + 1),
Int[(a + b*x^n)^(p - 1), x], x] /; FreeQ[{a, b}, x] && IGtQ[n, 0] && GtQ[p, 0] && (IntegerQ[2*p] || (EqQ[n, 2
] && IntegerQ[4*p]) || (EqQ[n, 2] && IntegerQ[3*p]) || LtQ[Denominator[p + 1/n], Denominator[p]])

Rule 206

Int[((a_) + (b_.)*(x_)^2)^(-1), x_Symbol] :> Simp[(1*ArcTanh[(Rt[-b, 2]*x)/Rt[a, 2]])/(Rt[a, 2]*Rt[-b, 2]), x]
/; FreeQ[{a, b}, x] && NegQ[a/b] && (GtQ[a, 0] || LtQ[b, 0])

Rule 217

Int[1/Sqrt[(a_) + (b_.)*(x_)^2], x_Symbol] :> Subst[Int[1/(1 - b*x^2), x], x, x/Sqrt[a + b*x^2]] /; FreeQ[{a,
b}, x] &&  !GtQ[a, 0]

Rubi steps

\begin {align*} \int \left (d+e x+f \sqrt {a+\frac {e^2 x^2}{f^2}}\right ) \, dx &=d x+\frac {e x^2}{2}+f \int \sqrt {a+\frac {e^2 x^2}{f^2}} \, dx\\ &=d x+\frac {e x^2}{2}+\frac {1}{2} f x \sqrt {a+\frac {e^2 x^2}{f^2}}+\frac {1}{2} (a f) \int \frac {1}{\sqrt {a+\frac {e^2 x^2}{f^2}}} \, dx\\ &=d x+\frac {e x^2}{2}+\frac {1}{2} f x \sqrt {a+\frac {e^2 x^2}{f^2}}+\frac {1}{2} (a f) \operatorname {Subst}\left (\int \frac {1}{1-\frac {e^2 x^2}{f^2}} \, dx,x,\frac {x}{\sqrt {a+\frac {e^2 x^2}{f^2}}}\right )\\ &=d x+\frac {e x^2}{2}+\frac {1}{2} f x \sqrt {a+\frac {e^2 x^2}{f^2}}+\frac {a f^2 \tanh ^{-1}\left (\frac {e x}{f \sqrt {a+\frac {e^2 x^2}{f^2}}}\right )}{2 e}\\ \end {align*}

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Mathematica [A]  time = 0.05, size = 81, normalized size = 1.19 \[ \frac {1}{2} f x \sqrt {\frac {a f^2+e^2 x^2}{f^2}}+\frac {a f^2 \log \left (e f \sqrt {\frac {a f^2+e^2 x^2}{f^2}}+e^2 x\right )}{2 e}+d x+\frac {e x^2}{2} \]

Antiderivative was successfully verified.

[In]

Integrate[d + e*x + f*Sqrt[a + (e^2*x^2)/f^2],x]

[Out]

d*x + (e*x^2)/2 + (f*x*Sqrt[(a*f^2 + e^2*x^2)/f^2])/2 + (a*f^2*Log[e^2*x + e*f*Sqrt[(a*f^2 + e^2*x^2)/f^2]])/(
2*e)

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fricas [A]  time = 0.41, size = 74, normalized size = 1.09 \[ \frac {e^{2} x^{2} - a f^{2} \log \left (-e x + f \sqrt {\frac {e^{2} x^{2} + a f^{2}}{f^{2}}}\right ) + e f x \sqrt {\frac {e^{2} x^{2} + a f^{2}}{f^{2}}} + 2 \, d e x}{2 \, e} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

1/2*(e^2*x^2 - a*f^2*log(-e*x + f*sqrt((e^2*x^2 + a*f^2)/f^2)) + e*f*x*sqrt((e^2*x^2 + a*f^2)/f^2) + 2*d*e*x)/
e

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giac [A]  time = 0.35, size = 65, normalized size = 0.96 \[ \frac {1}{2} \, x^{2} e + d x - \frac {{\left (a f^{2} e^{\left (-1\right )} \log \left ({\left | -x e + \sqrt {a f^{2} + x^{2} e^{2}} \right |}\right ) - \sqrt {a f^{2} + x^{2} e^{2}} x\right )} {\left | f \right |}}{2 \, f} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

1/2*x^2*e + d*x - 1/2*(a*f^2*e^(-1)*log(abs(-x*e + sqrt(a*f^2 + x^2*e^2))) - sqrt(a*f^2 + x^2*e^2)*x)*abs(f)/f

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maple [A]  time = 0.00, size = 75, normalized size = 1.10 \[ \frac {a f \ln \left (\frac {e^{2} x}{\sqrt {\frac {e^{2}}{f^{2}}}\, f^{2}}+\sqrt {\frac {e^{2} x^{2}}{f^{2}}+a}\right )}{2 \sqrt {\frac {e^{2}}{f^{2}}}}+\frac {e \,x^{2}}{2}+d x +\frac {\sqrt {\frac {e^{2} x^{2}}{f^{2}}+a}\, f x}{2} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(e*x+d+(e^2/f^2*x^2+a)^(1/2)*f,x)

[Out]

d*x+1/2*e*x^2+1/2*f*x*(e^2/f^2*x^2+a)^(1/2)+1/2*f*a*ln(1/(e^2/f^2)^(1/2)*e^2/f^2*x+(e^2/f^2*x^2+a)^(1/2))/(e^2
/f^2)^(1/2)

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maxima [A]  time = 0.87, size = 46, normalized size = 0.68 \[ \frac {1}{2} \, e x^{2} + \frac {1}{2} \, {\left (\frac {a f \operatorname {arsinh}\left (\frac {e x}{\sqrt {a} f}\right )}{e} + \sqrt {\frac {e^{2} x^{2}}{f^{2}} + a} x\right )} f + d x \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

1/2*e*x^2 + 1/2*(a*f*arcsinh(e*x/(sqrt(a)*f))/e + sqrt(e^2*x^2/f^2 + a)*x)*f + d*x

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mupad [B]  time = 3.89, size = 136, normalized size = 2.00 \[ \left \{\begin {array}{cl} x\,\left (d+\sqrt {a}\,f\right ) & \text {\ if\ \ }e=0\\ d\,x+\frac {e\,x^2}{2}+\frac {f\,x\,\sqrt {a+\frac {e^2\,x^2}{f^2}}}{2}+\frac {a\,e^2\,\ln \left (x\,\sqrt {\frac {e^2}{f^2}}+\sqrt {a+\frac {e^2\,x^2}{f^2}}\right )}{f\,{\left (\frac {e^2}{f^2}\right )}^{3/2}}-\frac {a\,e^2\,\ln \left (2\,x\,\sqrt {\frac {e^2}{f^2}}+2\,\sqrt {a+\frac {e^2\,x^2}{f^2}}\right )}{2\,f\,{\left (\frac {e^2}{f^2}\right )}^{3/2}} & \text {\ if\ \ }e\neq 0 \end {array}\right . \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(d + e*x + f*(a + (e^2*x^2)/f^2)^(1/2),x)

[Out]

piecewise(e == 0, x*(d + a^(1/2)*f), e ~= 0, d*x + (e*x^2)/2 + (f*x*(a + (e^2*x^2)/f^2)^(1/2))/2 + (a*e^2*log(
x*(e^2/f^2)^(1/2) + (a + (e^2*x^2)/f^2)^(1/2)))/(f*(e^2/f^2)^(3/2)) - (a*e^2*log(2*x*(e^2/f^2)^(1/2) + 2*(a +
(e^2*x^2)/f^2)^(1/2)))/(2*f*(e^2/f^2)^(3/2)))

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sympy [A]  time = 2.21, size = 54, normalized size = 0.79 \[ d x + \frac {e x^{2}}{2} + f \left (\frac {\sqrt {a} x \sqrt {1 + \frac {e^{2} x^{2}}{a f^{2}}}}{2} + \frac {a f \operatorname {asinh}{\left (\frac {e x}{\sqrt {a} f} \right )}}{2 e}\right ) \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(d+e*x+f*(a+e**2*x**2/f**2)**(1/2),x)

[Out]

d*x + e*x**2/2 + f*(sqrt(a)*x*sqrt(1 + e**2*x**2/(a*f**2))/2 + a*f*asinh(e*x/(sqrt(a)*f))/(2*e))

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