Integrand size = 37, antiderivative size = 116 \[ \int \frac {b+2 a x^3}{\left (-b+x+a x^3\right ) \sqrt [4]{-b x^3+a x^6}} \, dx=-\sqrt {2} \arctan \left (\frac {\sqrt {2} x \sqrt [4]{-b x^3+a x^6}}{-x^2+\sqrt {-b x^3+a x^6}}\right )-\sqrt {2} \text {arctanh}\left (\frac {\frac {x^2}{\sqrt {2}}+\frac {\sqrt {-b x^3+a x^6}}{\sqrt {2}}}{x \sqrt [4]{-b x^3+a x^6}}\right ) \]
-2^(1/2)*arctan(2^(1/2)*x*(a*x^6-b*x^3)^(1/4)/(-x^2+(a*x^6-b*x^3)^(1/2)))- 2^(1/2)*arctanh((1/2*2^(1/2)*x^2+1/2*(a*x^6-b*x^3)^(1/2)*2^(1/2))/x/(a*x^6 -b*x^3)^(1/4))
\[ \int \frac {b+2 a x^3}{\left (-b+x+a x^3\right ) \sqrt [4]{-b x^3+a x^6}} \, dx=\int \frac {b+2 a x^3}{\left (-b+x+a x^3\right ) \sqrt [4]{-b x^3+a x^6}} \, dx \]
Below are the steps used by Rubi to obtain the solution. The rule number used for the transformation is given above next to the arrow. The rules definitions used are listed below.
\(\displaystyle \int \frac {2 a x^3+b}{\left (a x^3-b+x\right ) \sqrt [4]{a x^6-b x^3}} \, dx\) |
\(\Big \downarrow \) 2467 |
\(\displaystyle \frac {x^{3/4} \sqrt [4]{a x^3-b} \int -\frac {2 a x^3+b}{x^{3/4} \left (-a x^3-x+b\right ) \sqrt [4]{a x^3-b}}dx}{\sqrt [4]{a x^6-b x^3}}\) |
\(\Big \downarrow \) 25 |
\(\displaystyle -\frac {x^{3/4} \sqrt [4]{a x^3-b} \int \frac {2 a x^3+b}{x^{3/4} \left (-a x^3-x+b\right ) \sqrt [4]{a x^3-b}}dx}{\sqrt [4]{a x^6-b x^3}}\) |
\(\Big \downarrow \) 2035 |
\(\displaystyle -\frac {4 x^{3/4} \sqrt [4]{a x^3-b} \int \frac {2 a x^3+b}{\left (-a x^3-x+b\right ) \sqrt [4]{a x^3-b}}d\sqrt [4]{x}}{\sqrt [4]{a x^6-b x^3}}\) |
\(\Big \downarrow \) 7293 |
\(\displaystyle -\frac {4 x^{3/4} \sqrt [4]{a x^3-b} \int \left (\frac {3 b-2 x}{\left (-a x^3-x+b\right ) \sqrt [4]{a x^3-b}}-\frac {2}{\sqrt [4]{a x^3-b}}\right )d\sqrt [4]{x}}{\sqrt [4]{a x^6-b x^3}}\) |
\(\Big \downarrow \) 2009 |
\(\displaystyle -\frac {4 x^{3/4} \sqrt [4]{a x^3-b} \left (3 b \int \frac {1}{\left (-a x^3-x+b\right ) \sqrt [4]{a x^3-b}}d\sqrt [4]{x}+2 \int \frac {x}{\sqrt [4]{a x^3-b} \left (a x^3+x-b\right )}d\sqrt [4]{x}-\frac {2 \sqrt [4]{x} \sqrt [4]{1-\frac {a x^3}{b}} \operatorname {Hypergeometric2F1}\left (\frac {1}{12},\frac {1}{4},\frac {13}{12},\frac {a x^3}{b}\right )}{\sqrt [4]{a x^3-b}}\right )}{\sqrt [4]{a x^6-b x^3}}\) |
3.18.22.3.1 Defintions of rubi rules used
Int[(Fx_)*(x_)^(m_), x_Symbol] :> With[{k = Denominator[m]}, Simp[k Subst [Int[x^(k*(m + 1) - 1)*SubstPower[Fx, x, k], x], x, x^(1/k)], x]] /; Fracti onQ[m] && AlgebraicFunctionQ[Fx, x]
Int[(Fx_.)*(Px_)^(p_), x_Symbol] :> With[{r = Expon[Px, x, Min]}, Simp[Px^F racPart[p]/(x^(r*FracPart[p])*ExpandToSum[Px/x^r, x]^FracPart[p]) Int[x^( p*r)*ExpandToSum[Px/x^r, x]^p*Fx, x], x] /; IGtQ[r, 0]] /; FreeQ[p, x] && P olyQ[Px, x] && !IntegerQ[p] && !MonomialQ[Px, x] && !PolyQ[Fx, x]
Time = 1.01 (sec) , antiderivative size = 148, normalized size of antiderivative = 1.28
method | result | size |
pseudoelliptic | \(\frac {\sqrt {2}\, \left (\ln \left (\frac {-\left (x^{3} \left (a \,x^{3}-b \right )\right )^{\frac {1}{4}} \sqrt {2}\, x +x^{2}+\sqrt {x^{3} \left (a \,x^{3}-b \right )}}{\left (x^{3} \left (a \,x^{3}-b \right )\right )^{\frac {1}{4}} \sqrt {2}\, x +x^{2}+\sqrt {x^{3} \left (a \,x^{3}-b \right )}}\right )+2 \arctan \left (\frac {\left (x^{3} \left (a \,x^{3}-b \right )\right )^{\frac {1}{4}} \sqrt {2}+x}{x}\right )+2 \arctan \left (\frac {\left (x^{3} \left (a \,x^{3}-b \right )\right )^{\frac {1}{4}} \sqrt {2}-x}{x}\right )\right )}{2}\) | \(148\) |
1/2*2^(1/2)*(ln((-(x^3*(a*x^3-b))^(1/4)*2^(1/2)*x+x^2+(x^3*(a*x^3-b))^(1/2 ))/((x^3*(a*x^3-b))^(1/4)*2^(1/2)*x+x^2+(x^3*(a*x^3-b))^(1/2)))+2*arctan(( (x^3*(a*x^3-b))^(1/4)*2^(1/2)+x)/x)+2*arctan(((x^3*(a*x^3-b))^(1/4)*2^(1/2 )-x)/x))
Timed out. \[ \int \frac {b+2 a x^3}{\left (-b+x+a x^3\right ) \sqrt [4]{-b x^3+a x^6}} \, dx=\text {Timed out} \]
\[ \int \frac {b+2 a x^3}{\left (-b+x+a x^3\right ) \sqrt [4]{-b x^3+a x^6}} \, dx=\int \frac {2 a x^{3} + b}{\sqrt [4]{x^{3} \left (a x^{3} - b\right )} \left (a x^{3} - b + x\right )}\, dx \]
\[ \int \frac {b+2 a x^3}{\left (-b+x+a x^3\right ) \sqrt [4]{-b x^3+a x^6}} \, dx=\int { \frac {2 \, a x^{3} + b}{{\left (a x^{6} - b x^{3}\right )}^{\frac {1}{4}} {\left (a x^{3} - b + x\right )}} \,d x } \]
\[ \int \frac {b+2 a x^3}{\left (-b+x+a x^3\right ) \sqrt [4]{-b x^3+a x^6}} \, dx=\int { \frac {2 \, a x^{3} + b}{{\left (a x^{6} - b x^{3}\right )}^{\frac {1}{4}} {\left (a x^{3} - b + x\right )}} \,d x } \]
Timed out. \[ \int \frac {b+2 a x^3}{\left (-b+x+a x^3\right ) \sqrt [4]{-b x^3+a x^6}} \, dx=\int \frac {2\,a\,x^3+b}{{\left (a\,x^6-b\,x^3\right )}^{1/4}\,\left (a\,x^3+x-b\right )} \,d x \]