3.11.1 \(\int \frac {1}{(a+b x^4) \sqrt {-c x^2+d \sqrt {a+b x^4}}} \, dx\) [1001]

Optimal. Leaf size=41 \[ \frac {\tan ^{-1}\left (\frac {\sqrt {c} x}{\sqrt {-c x^2+d \sqrt {a+b x^4}}}\right )}{a \sqrt {c}} \]

[Out]

arctan(x*c^(1/2)/(-c*x^2+d*(b*x^4+a)^(1/2))^(1/2))/a/c^(1/2)

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Rubi [A]
time = 0.10, antiderivative size = 41, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, integrand size = 34, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.059, Rules used = {2153, 209} \begin {gather*} \frac {\text {ArcTan}\left (\frac {\sqrt {c} x}{\sqrt {d \sqrt {a+b x^4}-c x^2}}\right )}{a \sqrt {c}} \end {gather*}

Antiderivative was successfully verified.

[In]

Int[1/((a + b*x^4)*Sqrt[-(c*x^2) + d*Sqrt[a + b*x^4]]),x]

[Out]

ArcTan[(Sqrt[c]*x)/Sqrt[-(c*x^2) + d*Sqrt[a + b*x^4]]]/(a*Sqrt[c])

Rule 209

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

Rule 2153

Int[1/(((a_) + (b_.)*(x_)^(n_.))*Sqrt[(c_.)*(x_)^2 + (d_.)*((a_) + (b_.)*(x_)^(n_.))^(p_.)]), x_Symbol] :> Dis
t[1/a, Subst[Int[1/(1 - c*x^2), x], x, x/Sqrt[c*x^2 + d*(a + b*x^n)^(2/n)]], x] /; FreeQ[{a, b, c, d, n}, x] &
& EqQ[p, 2/n]

Rubi steps

\begin {align*} \int \frac {1}{\left (a+b x^4\right ) \sqrt {-c x^2+d \sqrt {a+b x^4}}} \, dx &=\frac {\text {Subst}\left (\int \frac {1}{1+c x^2} \, dx,x,\frac {x}{\sqrt {-c x^2+d \sqrt {a+b x^4}}}\right )}{a}\\ &=\frac {\tan ^{-1}\left (\frac {\sqrt {c} x}{\sqrt {-c x^2+d \sqrt {a+b x^4}}}\right )}{a \sqrt {c}}\\ \end {align*}

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Mathematica [A]
time = 0.84, size = 44, normalized size = 1.07 \begin {gather*} -\frac {\tan ^{-1}\left (\frac {\sqrt {-c x^2+d \sqrt {a+b x^4}}}{\sqrt {c} x}\right )}{a \sqrt {c}} \end {gather*}

Antiderivative was successfully verified.

[In]

Integrate[1/((a + b*x^4)*Sqrt[-(c*x^2) + d*Sqrt[a + b*x^4]]),x]

[Out]

-(ArcTan[Sqrt[-(c*x^2) + d*Sqrt[a + b*x^4]]/(Sqrt[c]*x)]/(a*Sqrt[c]))

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Maple [F]
time = 0.03, size = 0, normalized size = 0.00 \[\int \frac {1}{\left (b \,x^{4}+a \right ) \sqrt {-c \,x^{2}+d \sqrt {b \,x^{4}+a}}}\, dx\]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(1/(b*x^4+a)/(-c*x^2+d*(b*x^4+a)^(1/2))^(1/2),x)

[Out]

int(1/(b*x^4+a)/(-c*x^2+d*(b*x^4+a)^(1/2))^(1/2),x)

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Maxima [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {Failed to integrate} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(1/(b*x^4+a)/(-c*x^2+d*(b*x^4+a)^(1/2))^(1/2),x, algorithm="maxima")

[Out]

integrate(1/((b*x^4 + a)*sqrt(-c*x^2 + sqrt(b*x^4 + a)*d)), x)

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Fricas [F(-1)] Timed out
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {Timed out} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(1/(b*x^4+a)/(-c*x^2+d*(b*x^4+a)^(1/2))^(1/2),x, algorithm="fricas")

[Out]

Timed out

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Sympy [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \int \frac {1}{\left (a + b x^{4}\right ) \sqrt {- c x^{2} + d \sqrt {a + b x^{4}}}}\, dx \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(1/(b*x**4+a)/(-c*x**2+d*(b*x**4+a)**(1/2))**(1/2),x)

[Out]

Integral(1/((a + b*x**4)*sqrt(-c*x**2 + d*sqrt(a + b*x**4))), x)

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Giac [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {could not integrate} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(1/(b*x^4+a)/(-c*x^2+d*(b*x^4+a)^(1/2))^(1/2),x, algorithm="giac")

[Out]

integrate(1/((b*x^4 + a)*sqrt(-c*x^2 + sqrt(b*x^4 + a)*d)), x)

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Mupad [F]
time = 0.00, size = -1, normalized size = -0.02 \begin {gather*} \int \frac {1}{\left (b\,x^4+a\right )\,\sqrt {d\,\sqrt {b\,x^4+a}-c\,x^2}} \,d x \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(1/((a + b*x^4)*(d*(a + b*x^4)^(1/2) - c*x^2)^(1/2)),x)

[Out]

int(1/((a + b*x^4)*(d*(a + b*x^4)^(1/2) - c*x^2)^(1/2)), x)

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