3.13.50 \(\int \frac {x^6}{(a-b x^4)^{3/4}} \, dx\) [1250]

Optimal. Leaf size=235 \[ -\frac {x^3 \sqrt [4]{a-b x^4}}{4 b}-\frac {3 a \tan ^{-1}\left (1-\frac {\sqrt {2} \sqrt [4]{b} x}{\sqrt [4]{a-b x^4}}\right )}{8 \sqrt {2} b^{7/4}}+\frac {3 a \tan ^{-1}\left (1+\frac {\sqrt {2} \sqrt [4]{b} x}{\sqrt [4]{a-b x^4}}\right )}{8 \sqrt {2} b^{7/4}}+\frac {3 a \log \left (1+\frac {\sqrt {b} x^2}{\sqrt {a-b x^4}}-\frac {\sqrt {2} \sqrt [4]{b} x}{\sqrt [4]{a-b x^4}}\right )}{16 \sqrt {2} b^{7/4}}-\frac {3 a \log \left (1+\frac {\sqrt {b} x^2}{\sqrt {a-b x^4}}+\frac {\sqrt {2} \sqrt [4]{b} x}{\sqrt [4]{a-b x^4}}\right )}{16 \sqrt {2} b^{7/4}} \]

[Out]

-1/4*x^3*(-b*x^4+a)^(1/4)/b+3/16*a*arctan(-1+b^(1/4)*x*2^(1/2)/(-b*x^4+a)^(1/4))/b^(7/4)*2^(1/2)+3/16*a*arctan
(1+b^(1/4)*x*2^(1/2)/(-b*x^4+a)^(1/4))/b^(7/4)*2^(1/2)+3/32*a*ln(1-b^(1/4)*x*2^(1/2)/(-b*x^4+a)^(1/4)+x^2*b^(1
/2)/(-b*x^4+a)^(1/2))/b^(7/4)*2^(1/2)-3/32*a*ln(1+b^(1/4)*x*2^(1/2)/(-b*x^4+a)^(1/4)+x^2*b^(1/2)/(-b*x^4+a)^(1
/2))/b^(7/4)*2^(1/2)

________________________________________________________________________________________

Rubi [A]
time = 0.08, antiderivative size = 235, normalized size of antiderivative = 1.00, number of steps used = 11, number of rules used = 8, integrand size = 16, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.500, Rules used = {327, 338, 303, 1176, 631, 210, 1179, 642} \begin {gather*} -\frac {3 a \text {ArcTan}\left (1-\frac {\sqrt {2} \sqrt [4]{b} x}{\sqrt [4]{a-b x^4}}\right )}{8 \sqrt {2} b^{7/4}}+\frac {3 a \text {ArcTan}\left (\frac {\sqrt {2} \sqrt [4]{b} x}{\sqrt [4]{a-b x^4}}+1\right )}{8 \sqrt {2} b^{7/4}}+\frac {3 a \log \left (-\frac {\sqrt {2} \sqrt [4]{b} x}{\sqrt [4]{a-b x^4}}+\frac {\sqrt {b} x^2}{\sqrt {a-b x^4}}+1\right )}{16 \sqrt {2} b^{7/4}}-\frac {3 a \log \left (\frac {\sqrt {2} \sqrt [4]{b} x}{\sqrt [4]{a-b x^4}}+\frac {\sqrt {b} x^2}{\sqrt {a-b x^4}}+1\right )}{16 \sqrt {2} b^{7/4}}-\frac {x^3 \sqrt [4]{a-b x^4}}{4 b} \end {gather*}

Antiderivative was successfully verified.

[In]

Int[x^6/(a - b*x^4)^(3/4),x]

[Out]

-1/4*(x^3*(a - b*x^4)^(1/4))/b - (3*a*ArcTan[1 - (Sqrt[2]*b^(1/4)*x)/(a - b*x^4)^(1/4)])/(8*Sqrt[2]*b^(7/4)) +
(3*a*ArcTan[1 + (Sqrt[2]*b^(1/4)*x)/(a - b*x^4)^(1/4)])/(8*Sqrt[2]*b^(7/4)) + (3*a*Log[1 + (Sqrt[b]*x^2)/Sqrt
[a - b*x^4] - (Sqrt[2]*b^(1/4)*x)/(a - b*x^4)^(1/4)])/(16*Sqrt[2]*b^(7/4)) - (3*a*Log[1 + (Sqrt[b]*x^2)/Sqrt[a
- b*x^4] + (Sqrt[2]*b^(1/4)*x)/(a - b*x^4)^(1/4)])/(16*Sqrt[2]*b^(7/4))

Rule 210

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

Rule 303

Int[(x_)^2/((a_) + (b_.)*(x_)^4), x_Symbol] :> With[{r = Numerator[Rt[a/b, 2]], s = Denominator[Rt[a/b, 2]]},
Dist[1/(2*s), Int[(r + s*x^2)/(a + b*x^4), x], x] - Dist[1/(2*s), Int[(r - s*x^2)/(a + b*x^4), x], x]] /; Free
Q[{a, b}, x] && (GtQ[a/b, 0] || (PosQ[a/b] && AtomQ[SplitProduct[SumBaseQ, a]] && AtomQ[SplitProduct[SumBaseQ,
b]]))

Rule 327

Int[((c_.)*(x_))^(m_)*((a_) + (b_.)*(x_)^(n_))^(p_), x_Symbol] :> Simp[c^(n - 1)*(c*x)^(m - n + 1)*((a + b*x^n
)^(p + 1)/(b*(m + n*p + 1))), x] - Dist[a*c^n*((m - n + 1)/(b*(m + n*p + 1))), Int[(c*x)^(m - n)*(a + b*x^n)^p
, x], x] /; FreeQ[{a, b, c, p}, x] && IGtQ[n, 0] && GtQ[m, n - 1] && NeQ[m + n*p + 1, 0] && IntBinomialQ[a, b,
c, n, m, p, x]

Rule 338

Int[(x_)^(m_.)*((a_) + (b_.)*(x_)^(n_))^(p_), x_Symbol] :> Dist[a^(p + (m + 1)/n), Subst[Int[x^m/(1 - b*x^n)^(
p + (m + 1)/n + 1), x], x, x/(a + b*x^n)^(1/n)], x] /; FreeQ[{a, b}, x] && IGtQ[n, 0] && LtQ[-1, p, 0] && NeQ[
p, -2^(-1)] && IntegersQ[m, p + (m + 1)/n]

Rule 631

Int[((a_) + (b_.)*(x_) + (c_.)*(x_)^2)^(-1), x_Symbol] :> With[{q = 1 - 4*Simplify[a*(c/b^2)]}, Dist[-2/b, Sub
st[Int[1/(q - x^2), x], x, 1 + 2*c*(x/b)], x] /; RationalQ[q] && (EqQ[q^2, 1] ||  !RationalQ[b^2 - 4*a*c])] /;
FreeQ[{a, b, c}, x] && NeQ[b^2 - 4*a*c, 0]

Rule 642

Int[((d_) + (e_.)*(x_))/((a_.) + (b_.)*(x_) + (c_.)*(x_)^2), x_Symbol] :> Simp[d*(Log[RemoveContent[a + b*x +
c*x^2, x]]/b), x] /; FreeQ[{a, b, c, d, e}, x] && EqQ[2*c*d - b*e, 0]

Rule 1176

Int[((d_) + (e_.)*(x_)^2)/((a_) + (c_.)*(x_)^4), x_Symbol] :> With[{q = Rt[2*(d/e), 2]}, Dist[e/(2*c), Int[1/S
imp[d/e + q*x + x^2, x], x], x] + Dist[e/(2*c), Int[1/Simp[d/e - q*x + x^2, x], x], x]] /; FreeQ[{a, c, d, e},
x] && EqQ[c*d^2 - a*e^2, 0] && PosQ[d*e]

Rule 1179

Int[((d_) + (e_.)*(x_)^2)/((a_) + (c_.)*(x_)^4), x_Symbol] :> With[{q = Rt[-2*(d/e), 2]}, Dist[e/(2*c*q), Int[
(q - 2*x)/Simp[d/e + q*x - x^2, x], x], x] + Dist[e/(2*c*q), Int[(q + 2*x)/Simp[d/e - q*x - x^2, x], x], x]] /
; FreeQ[{a, c, d, e}, x] && EqQ[c*d^2 - a*e^2, 0] && NegQ[d*e]

Rubi steps

\begin {align*} \int \frac {x^6}{\left (a-b x^4\right )^{3/4}} \, dx &=-\frac {x^3 \sqrt [4]{a-b x^4}}{4 b}+\frac {(3 a) \int \frac {x^2}{\left (a-b x^4\right )^{3/4}} \, dx}{4 b}\\ &=-\frac {x^3 \sqrt [4]{a-b x^4}}{4 b}+\frac {(3 a) \text {Subst}\left (\int \frac {x^2}{1+b x^4} \, dx,x,\frac {x}{\sqrt [4]{a-b x^4}}\right )}{4 b}\\ &=-\frac {x^3 \sqrt [4]{a-b x^4}}{4 b}-\frac {(3 a) \text {Subst}\left (\int \frac {1-\sqrt {b} x^2}{1+b x^4} \, dx,x,\frac {x}{\sqrt [4]{a-b x^4}}\right )}{8 b^{3/2}}+\frac {(3 a) \text {Subst}\left (\int \frac {1+\sqrt {b} x^2}{1+b x^4} \, dx,x,\frac {x}{\sqrt [4]{a-b x^4}}\right )}{8 b^{3/2}}\\ &=-\frac {x^3 \sqrt [4]{a-b x^4}}{4 b}+\frac {(3 a) \text {Subst}\left (\int \frac {1}{\frac {1}{\sqrt {b}}-\frac {\sqrt {2} x}{\sqrt [4]{b}}+x^2} \, dx,x,\frac {x}{\sqrt [4]{a-b x^4}}\right )}{16 b^2}+\frac {(3 a) \text {Subst}\left (\int \frac {1}{\frac {1}{\sqrt {b}}+\frac {\sqrt {2} x}{\sqrt [4]{b}}+x^2} \, dx,x,\frac {x}{\sqrt [4]{a-b x^4}}\right )}{16 b^2}+\frac {(3 a) \text {Subst}\left (\int \frac {\frac {\sqrt {2}}{\sqrt [4]{b}}+2 x}{-\frac {1}{\sqrt {b}}-\frac {\sqrt {2} x}{\sqrt [4]{b}}-x^2} \, dx,x,\frac {x}{\sqrt [4]{a-b x^4}}\right )}{16 \sqrt {2} b^{7/4}}+\frac {(3 a) \text {Subst}\left (\int \frac {\frac {\sqrt {2}}{\sqrt [4]{b}}-2 x}{-\frac {1}{\sqrt {b}}+\frac {\sqrt {2} x}{\sqrt [4]{b}}-x^2} \, dx,x,\frac {x}{\sqrt [4]{a-b x^4}}\right )}{16 \sqrt {2} b^{7/4}}\\ &=-\frac {x^3 \sqrt [4]{a-b x^4}}{4 b}+\frac {3 a \log \left (1+\frac {\sqrt {b} x^2}{\sqrt {a-b x^4}}-\frac {\sqrt {2} \sqrt [4]{b} x}{\sqrt [4]{a-b x^4}}\right )}{16 \sqrt {2} b^{7/4}}-\frac {3 a \log \left (1+\frac {\sqrt {b} x^2}{\sqrt {a-b x^4}}+\frac {\sqrt {2} \sqrt [4]{b} x}{\sqrt [4]{a-b x^4}}\right )}{16 \sqrt {2} b^{7/4}}+\frac {(3 a) \text {Subst}\left (\int \frac {1}{-1-x^2} \, dx,x,1-\frac {\sqrt {2} \sqrt [4]{b} x}{\sqrt [4]{a-b x^4}}\right )}{8 \sqrt {2} b^{7/4}}-\frac {(3 a) \text {Subst}\left (\int \frac {1}{-1-x^2} \, dx,x,1+\frac {\sqrt {2} \sqrt [4]{b} x}{\sqrt [4]{a-b x^4}}\right )}{8 \sqrt {2} b^{7/4}}\\ &=-\frac {x^3 \sqrt [4]{a-b x^4}}{4 b}-\frac {3 a \tan ^{-1}\left (1-\frac {\sqrt {2} \sqrt [4]{b} x}{\sqrt [4]{a-b x^4}}\right )}{8 \sqrt {2} b^{7/4}}+\frac {3 a \tan ^{-1}\left (1+\frac {\sqrt {2} \sqrt [4]{b} x}{\sqrt [4]{a-b x^4}}\right )}{8 \sqrt {2} b^{7/4}}+\frac {3 a \log \left (1+\frac {\sqrt {b} x^2}{\sqrt {a-b x^4}}-\frac {\sqrt {2} \sqrt [4]{b} x}{\sqrt [4]{a-b x^4}}\right )}{16 \sqrt {2} b^{7/4}}-\frac {3 a \log \left (1+\frac {\sqrt {b} x^2}{\sqrt {a-b x^4}}+\frac {\sqrt {2} \sqrt [4]{b} x}{\sqrt [4]{a-b x^4}}\right )}{16 \sqrt {2} b^{7/4}}\\ \end {align*}

________________________________________________________________________________________

Mathematica [A]
time = 0.50, size = 148, normalized size = 0.63 \begin {gather*} -\frac {4 b^{3/4} x^3 \sqrt [4]{a-b x^4}+3 \sqrt {2} a \tan ^{-1}\left (\frac {\sqrt {2} \sqrt [4]{b} x \sqrt [4]{a-b x^4}}{\sqrt {b} x^2-\sqrt {a-b x^4}}\right )+3 \sqrt {2} a \tanh ^{-1}\left (\frac {\sqrt {b} x^2+\sqrt {a-b x^4}}{\sqrt {2} \sqrt [4]{b} x \sqrt [4]{a-b x^4}}\right )}{16 b^{7/4}} \end {gather*}

Antiderivative was successfully verified.

[In]

Integrate[x^6/(a - b*x^4)^(3/4),x]

[Out]

-1/16*(4*b^(3/4)*x^3*(a - b*x^4)^(1/4) + 3*Sqrt[2]*a*ArcTan[(Sqrt[2]*b^(1/4)*x*(a - b*x^4)^(1/4))/(Sqrt[b]*x^2
- Sqrt[a - b*x^4])] + 3*Sqrt[2]*a*ArcTanh[(Sqrt[b]*x^2 + Sqrt[a - b*x^4])/(Sqrt[2]*b^(1/4)*x*(a - b*x^4)^(1/4
))])/b^(7/4)

________________________________________________________________________________________

Maple [F]
time = 0.00, size = 0, normalized size = 0.00 \[\int \frac {x^{6}}{\left (-b \,x^{4}+a \right )^{\frac {3}{4}}}\, dx\]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(x^6/(-b*x^4+a)^(3/4),x)

[Out]

int(x^6/(-b*x^4+a)^(3/4),x)

________________________________________________________________________________________

Maxima [A]
time = 0.52, size = 222, normalized size = 0.94 \begin {gather*} -\frac {3 \, {\left (\frac {2 \, \sqrt {2} a \arctan \left (\frac {\sqrt {2} {\left (\sqrt {2} b^{\frac {1}{4}} + \frac {2 \, {\left (-b x^{4} + a\right )}^{\frac {1}{4}}}{x}\right )}}{2 \, b^{\frac {1}{4}}}\right )}{b^{\frac {3}{4}}} + \frac {2 \, \sqrt {2} a \arctan \left (-\frac {\sqrt {2} {\left (\sqrt {2} b^{\frac {1}{4}} - \frac {2 \, {\left (-b x^{4} + a\right )}^{\frac {1}{4}}}{x}\right )}}{2 \, b^{\frac {1}{4}}}\right )}{b^{\frac {3}{4}}} + \frac {\sqrt {2} a \log \left (\sqrt {b} + \frac {\sqrt {2} {\left (-b x^{4} + a\right )}^{\frac {1}{4}} b^{\frac {1}{4}}}{x} + \frac {\sqrt {-b x^{4} + a}}{x^{2}}\right )}{b^{\frac {3}{4}}} - \frac {\sqrt {2} a \log \left (\sqrt {b} - \frac {\sqrt {2} {\left (-b x^{4} + a\right )}^{\frac {1}{4}} b^{\frac {1}{4}}}{x} + \frac {\sqrt {-b x^{4} + a}}{x^{2}}\right )}{b^{\frac {3}{4}}}\right )}}{32 \, b} - \frac {{\left (-b x^{4} + a\right )}^{\frac {1}{4}} a}{4 \, {\left (b^{2} - \frac {{\left (b x^{4} - a\right )} b}{x^{4}}\right )} x} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^6/(-b*x^4+a)^(3/4),x, algorithm="maxima")

[Out]

-3/32*(2*sqrt(2)*a*arctan(1/2*sqrt(2)*(sqrt(2)*b^(1/4) + 2*(-b*x^4 + a)^(1/4)/x)/b^(1/4))/b^(3/4) + 2*sqrt(2)*
a*arctan(-1/2*sqrt(2)*(sqrt(2)*b^(1/4) - 2*(-b*x^4 + a)^(1/4)/x)/b^(1/4))/b^(3/4) + sqrt(2)*a*log(sqrt(b) + sq
rt(2)*(-b*x^4 + a)^(1/4)*b^(1/4)/x + sqrt(-b*x^4 + a)/x^2)/b^(3/4) - sqrt(2)*a*log(sqrt(b) - sqrt(2)*(-b*x^4 +
a)^(1/4)*b^(1/4)/x + sqrt(-b*x^4 + a)/x^2)/b^(3/4))/b - 1/4*(-b*x^4 + a)^(1/4)*a/((b^2 - (b*x^4 - a)*b/x^4)*x
)

________________________________________________________________________________________

Fricas [A]
time = 0.39, size = 217, normalized size = 0.92 \begin {gather*} -\frac {4 \, {\left (-b x^{4} + a\right )}^{\frac {1}{4}} x^{3} + 12 \, b \left (-\frac {a^{4}}{b^{7}}\right )^{\frac {1}{4}} \arctan \left (\frac {b^{5} x \sqrt {\frac {b^{4} x^{2} \sqrt {-\frac {a^{4}}{b^{7}}} + \sqrt {-b x^{4} + a} a^{2}}{x^{2}}} \left (-\frac {a^{4}}{b^{7}}\right )^{\frac {3}{4}} - {\left (-b x^{4} + a\right )}^{\frac {1}{4}} a b^{5} \left (-\frac {a^{4}}{b^{7}}\right )^{\frac {3}{4}}}{a^{4} x}\right ) + 3 \, b \left (-\frac {a^{4}}{b^{7}}\right )^{\frac {1}{4}} \log \left (\frac {3 \, {\left (b^{2} x \left (-\frac {a^{4}}{b^{7}}\right )^{\frac {1}{4}} + {\left (-b x^{4} + a\right )}^{\frac {1}{4}} a\right )}}{x}\right ) - 3 \, b \left (-\frac {a^{4}}{b^{7}}\right )^{\frac {1}{4}} \log \left (-\frac {3 \, {\left (b^{2} x \left (-\frac {a^{4}}{b^{7}}\right )^{\frac {1}{4}} - {\left (-b x^{4} + a\right )}^{\frac {1}{4}} a\right )}}{x}\right )}{16 \, b} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^6/(-b*x^4+a)^(3/4),x, algorithm="fricas")

[Out]

-1/16*(4*(-b*x^4 + a)^(1/4)*x^3 + 12*b*(-a^4/b^7)^(1/4)*arctan((b^5*x*sqrt((b^4*x^2*sqrt(-a^4/b^7) + sqrt(-b*x
^4 + a)*a^2)/x^2)*(-a^4/b^7)^(3/4) - (-b*x^4 + a)^(1/4)*a*b^5*(-a^4/b^7)^(3/4))/(a^4*x)) + 3*b*(-a^4/b^7)^(1/4
)*log(3*(b^2*x*(-a^4/b^7)^(1/4) + (-b*x^4 + a)^(1/4)*a)/x) - 3*b*(-a^4/b^7)^(1/4)*log(-3*(b^2*x*(-a^4/b^7)^(1/
4) - (-b*x^4 + a)^(1/4)*a)/x))/b

________________________________________________________________________________________

Sympy [C] Result contains complex when optimal does not.
time = 0.68, size = 39, normalized size = 0.17 \begin {gather*} \frac {x^{7} \Gamma \left (\frac {7}{4}\right ) {{}_{2}F_{1}\left (\begin {matrix} \frac {3}{4}, \frac {7}{4} \\ \frac {11}{4} \end {matrix}\middle | {\frac {b x^{4} e^{2 i \pi }}{a}} \right )}}{4 a^{\frac {3}{4}} \Gamma \left (\frac {11}{4}\right )} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x**6/(-b*x**4+a)**(3/4),x)

[Out]

x**7*gamma(7/4)*hyper((3/4, 7/4), (11/4,), b*x**4*exp_polar(2*I*pi)/a)/(4*a**(3/4)*gamma(11/4))

________________________________________________________________________________________

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(x^6/(-b*x^4+a)^(3/4),x, algorithm="giac")

[Out]

integrate(x^6/(-b*x^4 + a)^(3/4), x)

________________________________________________________________________________________

Mupad [F]
time = 0.00, size = -1, normalized size = -0.00 \begin {gather*} \int \frac {x^6}{{\left (a-b\,x^4\right )}^{3/4}} \,d x \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(x^6/(a - b*x^4)^(3/4),x)

[Out]

int(x^6/(a - b*x^4)^(3/4), x)

________________________________________________________________________________________