Integrand size = 15, antiderivative size = 144 \[ \int x^{5/2} (2+b x)^{5/2} \, dx=\frac {5 \sqrt {x} \sqrt {2+b x}}{16 b^3}-\frac {5 x^{3/2} \sqrt {2+b x}}{48 b^2}+\frac {x^{5/2} \sqrt {2+b x}}{24 b}+\frac {1}{8} x^{7/2} \sqrt {2+b x}+\frac {1}{6} x^{7/2} (2+b x)^{3/2}+\frac {1}{6} x^{7/2} (2+b x)^{5/2}-\frac {5 \text {arcsinh}\left (\frac {\sqrt {b} \sqrt {x}}{\sqrt {2}}\right )}{8 b^{7/2}} \]
1/6*x^(7/2)*(b*x+2)^(3/2)+1/6*x^(7/2)*(b*x+2)^(5/2)-5/8*arcsinh(1/2*b^(1/2 )*x^(1/2)*2^(1/2))/b^(7/2)-5/48*x^(3/2)*(b*x+2)^(1/2)/b^2+1/24*x^(5/2)*(b* x+2)^(1/2)/b+1/8*x^(7/2)*(b*x+2)^(1/2)+5/16*x^(1/2)*(b*x+2)^(1/2)/b^3
Time = 0.45 (sec) , antiderivative size = 100, normalized size of antiderivative = 0.69 \[ \int x^{5/2} (2+b x)^{5/2} \, dx=\frac {\sqrt {x} \sqrt {2+b x} \left (15-5 b x+2 b^2 x^2+54 b^3 x^3+40 b^4 x^4+8 b^5 x^5\right )}{48 b^3}+\frac {5 \text {arctanh}\left (\frac {\sqrt {b} \sqrt {x}}{\sqrt {2}-\sqrt {2+b x}}\right )}{4 b^{7/2}} \]
(Sqrt[x]*Sqrt[2 + b*x]*(15 - 5*b*x + 2*b^2*x^2 + 54*b^3*x^3 + 40*b^4*x^4 + 8*b^5*x^5))/(48*b^3) + (5*ArcTanh[(Sqrt[b]*Sqrt[x])/(Sqrt[2] - Sqrt[2 + b *x])])/(4*b^(7/2))
Time = 0.21 (sec) , antiderivative size = 170, normalized size of antiderivative = 1.18, number of steps used = 9, number of rules used = 8, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.533, Rules used = {60, 60, 60, 60, 60, 60, 63, 222}
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.
| \(\displaystyle \int x^{5/2} (b x+2)^{5/2} \, dx\) |
| \(\Big \downarrow \) 60 |
| \(\displaystyle \frac {5}{6} \int x^{5/2} (b x+2)^{3/2}dx+\frac {1}{6} x^{7/2} (b x+2)^{5/2}\) |
| \(\Big \downarrow \) 60 |
| \(\displaystyle \frac {5}{6} \left (\frac {3}{5} \int x^{5/2} \sqrt {b x+2}dx+\frac {1}{5} x^{7/2} (b x+2)^{3/2}\right )+\frac {1}{6} x^{7/2} (b x+2)^{5/2}\) |
| \(\Big \downarrow \) 60 |
| \(\displaystyle \frac {5}{6} \left (\frac {3}{5} \left (\frac {1}{4} \int \frac {x^{5/2}}{\sqrt {b x+2}}dx+\frac {1}{4} x^{7/2} \sqrt {b x+2}\right )+\frac {1}{5} x^{7/2} (b x+2)^{3/2}\right )+\frac {1}{6} x^{7/2} (b x+2)^{5/2}\) |
| \(\Big \downarrow \) 60 |
| \(\displaystyle \frac {5}{6} \left (\frac {3}{5} \left (\frac {1}{4} \left (\frac {x^{5/2} \sqrt {b x+2}}{3 b}-\frac {5 \int \frac {x^{3/2}}{\sqrt {b x+2}}dx}{3 b}\right )+\frac {1}{4} x^{7/2} \sqrt {b x+2}\right )+\frac {1}{5} x^{7/2} (b x+2)^{3/2}\right )+\frac {1}{6} x^{7/2} (b x+2)^{5/2}\) |
| \(\Big \downarrow \) 60 |
| \(\displaystyle \frac {5}{6} \left (\frac {3}{5} \left (\frac {1}{4} \left (\frac {x^{5/2} \sqrt {b x+2}}{3 b}-\frac {5 \left (\frac {x^{3/2} \sqrt {b x+2}}{2 b}-\frac {3 \int \frac {\sqrt {x}}{\sqrt {b x+2}}dx}{2 b}\right )}{3 b}\right )+\frac {1}{4} x^{7/2} \sqrt {b x+2}\right )+\frac {1}{5} x^{7/2} (b x+2)^{3/2}\right )+\frac {1}{6} x^{7/2} (b x+2)^{5/2}\) |
| \(\Big \downarrow \) 60 |
| \(\displaystyle \frac {5}{6} \left (\frac {3}{5} \left (\frac {1}{4} \left (\frac {x^{5/2} \sqrt {b x+2}}{3 b}-\frac {5 \left (\frac {x^{3/2} \sqrt {b x+2}}{2 b}-\frac {3 \left (\frac {\sqrt {x} \sqrt {b x+2}}{b}-\frac {\int \frac {1}{\sqrt {x} \sqrt {b x+2}}dx}{b}\right )}{2 b}\right )}{3 b}\right )+\frac {1}{4} x^{7/2} \sqrt {b x+2}\right )+\frac {1}{5} x^{7/2} (b x+2)^{3/2}\right )+\frac {1}{6} x^{7/2} (b x+2)^{5/2}\) |
| \(\Big \downarrow \) 63 |
| \(\displaystyle \frac {5}{6} \left (\frac {3}{5} \left (\frac {1}{4} \left (\frac {x^{5/2} \sqrt {b x+2}}{3 b}-\frac {5 \left (\frac {x^{3/2} \sqrt {b x+2}}{2 b}-\frac {3 \left (\frac {\sqrt {x} \sqrt {b x+2}}{b}-\frac {2 \int \frac {1}{\sqrt {b x+2}}d\sqrt {x}}{b}\right )}{2 b}\right )}{3 b}\right )+\frac {1}{4} x^{7/2} \sqrt {b x+2}\right )+\frac {1}{5} x^{7/2} (b x+2)^{3/2}\right )+\frac {1}{6} x^{7/2} (b x+2)^{5/2}\) |
| \(\Big \downarrow \) 222 |
| \(\displaystyle \frac {5}{6} \left (\frac {3}{5} \left (\frac {1}{4} \left (\frac {x^{5/2} \sqrt {b x+2}}{3 b}-\frac {5 \left (\frac {x^{3/2} \sqrt {b x+2}}{2 b}-\frac {3 \left (\frac {\sqrt {x} \sqrt {b x+2}}{b}-\frac {2 \text {arcsinh}\left (\frac {\sqrt {b} \sqrt {x}}{\sqrt {2}}\right )}{b^{3/2}}\right )}{2 b}\right )}{3 b}\right )+\frac {1}{4} x^{7/2} \sqrt {b x+2}\right )+\frac {1}{5} x^{7/2} (b x+2)^{3/2}\right )+\frac {1}{6} x^{7/2} (b x+2)^{5/2}\) |
(x^(7/2)*(2 + b*x)^(5/2))/6 + (5*((x^(7/2)*(2 + b*x)^(3/2))/5 + (3*((x^(7/ 2)*Sqrt[2 + b*x])/4 + ((x^(5/2)*Sqrt[2 + b*x])/(3*b) - (5*((x^(3/2)*Sqrt[2 + b*x])/(2*b) - (3*((Sqrt[x]*Sqrt[2 + b*x])/b - (2*ArcSinh[(Sqrt[b]*Sqrt[ x])/Sqrt[2]])/b^(3/2)))/(2*b)))/(3*b))/4))/5))/6
3.6.57.3.1 Defintions of rubi rules used
Int[((a_.) + (b_.)*(x_))^(m_)*((c_.) + (d_.)*(x_))^(n_), x_Symbol] :> Simp[ (a + b*x)^(m + 1)*((c + d*x)^n/(b*(m + n + 1))), x] + Simp[n*((b*c - a*d)/( b*(m + n + 1))) Int[(a + b*x)^m*(c + d*x)^(n - 1), x], x] /; FreeQ[{a, b, c, d}, x] && GtQ[n, 0] && NeQ[m + n + 1, 0] && !(IGtQ[m, 0] && ( !Integer Q[n] || (GtQ[m, 0] && LtQ[m - n, 0]))) && !ILtQ[m + n + 2, 0] && IntLinear Q[a, b, c, d, m, n, x]
Int[1/(Sqrt[(b_.)*(x_)]*Sqrt[(c_) + (d_.)*(x_)]), x_Symbol] :> Simp[2/b S ubst[Int[1/Sqrt[c + d*(x^2/b)], x], x, Sqrt[b*x]], x] /; FreeQ[{b, c, d}, x ] && GtQ[c, 0]
Int[1/Sqrt[(a_) + (b_.)*(x_)^2], x_Symbol] :> Simp[ArcSinh[Rt[b, 2]*(x/Sqrt [a])]/Rt[b, 2], x] /; FreeQ[{a, b}, x] && GtQ[a, 0] && PosQ[b]
Time = 0.09 (sec) , antiderivative size = 87, normalized size of antiderivative = 0.60
| method | result | size |
| meijerg | \(-\frac {120 \left (-\frac {\sqrt {\pi }\, \sqrt {x}\, \sqrt {2}\, \sqrt {b}\, \left (56 b^{5} x^{5}+280 b^{4} x^{4}+378 b^{3} x^{3}+14 b^{2} x^{2}-35 b x +105\right ) \sqrt {\frac {b x}{2}+1}}{40320}+\frac {\sqrt {\pi }\, \operatorname {arcsinh}\left (\frac {\sqrt {b}\, \sqrt {x}\, \sqrt {2}}{2}\right )}{192}\right )}{b^{\frac {7}{2}} \sqrt {\pi }}\) | \(87\) |
| risch | \(\frac {\left (8 b^{5} x^{5}+40 b^{4} x^{4}+54 b^{3} x^{3}+2 b^{2} x^{2}-5 b x +15\right ) \sqrt {x}\, \sqrt {b x +2}}{48 b^{3}}-\frac {5 \ln \left (\frac {b x +1}{\sqrt {b}}+\sqrt {b \,x^{2}+2 x}\right ) \sqrt {x \left (b x +2\right )}}{16 b^{\frac {7}{2}} \sqrt {x}\, \sqrt {b x +2}}\) | \(101\) |
| default | \(\frac {x^{\frac {5}{2}} \left (b x +2\right )^{\frac {7}{2}}}{6 b}-\frac {5 \left (\frac {x^{\frac {3}{2}} \left (b x +2\right )^{\frac {7}{2}}}{5 b}-\frac {3 \left (\frac {\sqrt {x}\, \left (b x +2\right )^{\frac {7}{2}}}{4 b}-\frac {\frac {\left (b x +2\right )^{\frac {5}{2}} \sqrt {x}}{3}+\frac {5 \left (b x +2\right )^{\frac {3}{2}} \sqrt {x}}{6}+\frac {5 \sqrt {x}\, \sqrt {b x +2}}{2}+\frac {5 \sqrt {x \left (b x +2\right )}\, \ln \left (\frac {b x +1}{\sqrt {b}}+\sqrt {b \,x^{2}+2 x}\right )}{2 \sqrt {b x +2}\, \sqrt {x}\, \sqrt {b}}}{4 b}\right )}{5 b}\right )}{6 b}\) | \(147\) |
-120/b^(7/2)/Pi^(1/2)*(-1/40320*Pi^(1/2)*x^(1/2)*2^(1/2)*b^(1/2)*(56*b^5*x ^5+280*b^4*x^4+378*b^3*x^3+14*b^2*x^2-35*b*x+105)*(1/2*b*x+1)^(1/2)+1/192* Pi^(1/2)*arcsinh(1/2*b^(1/2)*x^(1/2)*2^(1/2)))
Time = 0.23 (sec) , antiderivative size = 172, normalized size of antiderivative = 1.19 \[ \int x^{5/2} (2+b x)^{5/2} \, dx=\left [\frac {{\left (8 \, b^{6} x^{5} + 40 \, b^{5} x^{4} + 54 \, b^{4} x^{3} + 2 \, b^{3} x^{2} - 5 \, b^{2} x + 15 \, b\right )} \sqrt {b x + 2} \sqrt {x} + 15 \, \sqrt {b} \log \left (b x - \sqrt {b x + 2} \sqrt {b} \sqrt {x} + 1\right )}{48 \, b^{4}}, \frac {{\left (8 \, b^{6} x^{5} + 40 \, b^{5} x^{4} + 54 \, b^{4} x^{3} + 2 \, b^{3} x^{2} - 5 \, b^{2} x + 15 \, b\right )} \sqrt {b x + 2} \sqrt {x} + 30 \, \sqrt {-b} \arctan \left (\frac {\sqrt {b x + 2} \sqrt {-b}}{b \sqrt {x}}\right )}{48 \, b^{4}}\right ] \]
[1/48*((8*b^6*x^5 + 40*b^5*x^4 + 54*b^4*x^3 + 2*b^3*x^2 - 5*b^2*x + 15*b)* sqrt(b*x + 2)*sqrt(x) + 15*sqrt(b)*log(b*x - sqrt(b*x + 2)*sqrt(b)*sqrt(x) + 1))/b^4, 1/48*((8*b^6*x^5 + 40*b^5*x^4 + 54*b^4*x^3 + 2*b^3*x^2 - 5*b^2 *x + 15*b)*sqrt(b*x + 2)*sqrt(x) + 30*sqrt(-b)*arctan(sqrt(b*x + 2)*sqrt(- b)/(b*sqrt(x))))/b^4]
Timed out. \[ \int x^{5/2} (2+b x)^{5/2} \, dx=\text {Timed out} \]
Leaf count of result is larger than twice the leaf count of optimal. 223 vs. \(2 (99) = 198\).
Time = 0.29 (sec) , antiderivative size = 223, normalized size of antiderivative = 1.55 \[ \int x^{5/2} (2+b x)^{5/2} \, dx=\frac {\frac {15 \, \sqrt {b x + 2} b^{5}}{\sqrt {x}} - \frac {85 \, {\left (b x + 2\right )}^{\frac {3}{2}} b^{4}}{x^{\frac {3}{2}}} + \frac {198 \, {\left (b x + 2\right )}^{\frac {5}{2}} b^{3}}{x^{\frac {5}{2}}} + \frac {198 \, {\left (b x + 2\right )}^{\frac {7}{2}} b^{2}}{x^{\frac {7}{2}}} - \frac {85 \, {\left (b x + 2\right )}^{\frac {9}{2}} b}{x^{\frac {9}{2}}} + \frac {15 \, {\left (b x + 2\right )}^{\frac {11}{2}}}{x^{\frac {11}{2}}}}{24 \, {\left (b^{9} - \frac {6 \, {\left (b x + 2\right )} b^{8}}{x} + \frac {15 \, {\left (b x + 2\right )}^{2} b^{7}}{x^{2}} - \frac {20 \, {\left (b x + 2\right )}^{3} b^{6}}{x^{3}} + \frac {15 \, {\left (b x + 2\right )}^{4} b^{5}}{x^{4}} - \frac {6 \, {\left (b x + 2\right )}^{5} b^{4}}{x^{5}} + \frac {{\left (b x + 2\right )}^{6} b^{3}}{x^{6}}\right )}} + \frac {5 \, \log \left (-\frac {\sqrt {b} - \frac {\sqrt {b x + 2}}{\sqrt {x}}}{\sqrt {b} + \frac {\sqrt {b x + 2}}{\sqrt {x}}}\right )}{16 \, b^{\frac {7}{2}}} \]
1/24*(15*sqrt(b*x + 2)*b^5/sqrt(x) - 85*(b*x + 2)^(3/2)*b^4/x^(3/2) + 198* (b*x + 2)^(5/2)*b^3/x^(5/2) + 198*(b*x + 2)^(7/2)*b^2/x^(7/2) - 85*(b*x + 2)^(9/2)*b/x^(9/2) + 15*(b*x + 2)^(11/2)/x^(11/2))/(b^9 - 6*(b*x + 2)*b^8/ x + 15*(b*x + 2)^2*b^7/x^2 - 20*(b*x + 2)^3*b^6/x^3 + 15*(b*x + 2)^4*b^5/x ^4 - 6*(b*x + 2)^5*b^4/x^5 + (b*x + 2)^6*b^3/x^6) + 5/16*log(-(sqrt(b) - s qrt(b*x + 2)/sqrt(x))/(sqrt(b) + sqrt(b*x + 2)/sqrt(x)))/b^(7/2)
Leaf count of result is larger than twice the leaf count of optimal. 436 vs. \(2 (99) = 198\).
Time = 23.79 (sec) , antiderivative size = 436, normalized size of antiderivative = 3.03 \[ \int x^{5/2} (2+b x)^{5/2} \, dx=\frac {{\left ({\left ({\left (2 \, {\left ({\left (b x + 2\right )} {\left (4 \, {\left (b x + 2\right )} {\left (\frac {5 \, {\left (b x + 2\right )}}{b^{5}} - \frac {61}{b^{5}}\right )} + \frac {1251}{b^{5}}\right )} - \frac {3481}{b^{5}}\right )} {\left (b x + 2\right )} + \frac {11395}{b^{5}}\right )} {\left (b x + 2\right )} - \frac {11895}{b^{5}}\right )} \sqrt {{\left (b x + 2\right )} b - 2 \, b} \sqrt {b x + 2} - \frac {6930 \, \log \left ({\left | -\sqrt {b x + 2} \sqrt {b} + \sqrt {{\left (b x + 2\right )} b - 2 \, b} \right |}\right )}{b^{\frac {9}{2}}}\right )} b {\left | b \right |} + 36 \, {\left ({\left ({\left (2 \, {\left (b x + 2\right )} {\left ({\left (b x + 2\right )} {\left (\frac {4 \, {\left (b x + 2\right )}}{b^{4}} - \frac {41}{b^{4}}\right )} + \frac {171}{b^{4}}\right )} - \frac {745}{b^{4}}\right )} {\left (b x + 2\right )} + \frac {965}{b^{4}}\right )} \sqrt {{\left (b x + 2\right )} b - 2 \, b} \sqrt {b x + 2} + \frac {630 \, \log \left ({\left | -\sqrt {b x + 2} \sqrt {b} + \sqrt {{\left (b x + 2\right )} b - 2 \, b} \right |}\right )}{b^{\frac {7}{2}}}\right )} {\left | b \right |} + \frac {120 \, {\left ({\left ({\left (b x + 2\right )} {\left (2 \, {\left (b x + 2\right )} {\left (\frac {3 \, {\left (b x + 2\right )}}{b^{3}} - \frac {25}{b^{3}}\right )} + \frac {163}{b^{3}}\right )} - \frac {279}{b^{3}}\right )} \sqrt {{\left (b x + 2\right )} b - 2 \, b} \sqrt {b x + 2} - \frac {210 \, \log \left ({\left | -\sqrt {b x + 2} \sqrt {b} + \sqrt {{\left (b x + 2\right )} b - 2 \, b} \right |}\right )}{b^{\frac {5}{2}}}\right )} {\left | b \right |}}{b} + \frac {320 \, {\left (\sqrt {{\left (b x + 2\right )} b - 2 \, b} \sqrt {b x + 2} {\left ({\left (b x + 2\right )} {\left (\frac {2 \, {\left (b x + 2\right )}}{b^{2}} - \frac {13}{b^{2}}\right )} + \frac {33}{b^{2}}\right )} + \frac {30 \, \log \left ({\left | -\sqrt {b x + 2} \sqrt {b} + \sqrt {{\left (b x + 2\right )} b - 2 \, b} \right |}\right )}{b^{\frac {3}{2}}}\right )} {\left | b \right |}}{b^{2}}}{240 \, b} \]
1/240*((((2*((b*x + 2)*(4*(b*x + 2)*(5*(b*x + 2)/b^5 - 61/b^5) + 1251/b^5) - 3481/b^5)*(b*x + 2) + 11395/b^5)*(b*x + 2) - 11895/b^5)*sqrt((b*x + 2)* b - 2*b)*sqrt(b*x + 2) - 6930*log(abs(-sqrt(b*x + 2)*sqrt(b) + sqrt((b*x + 2)*b - 2*b)))/b^(9/2))*b*abs(b) + 36*(((2*(b*x + 2)*((b*x + 2)*(4*(b*x + 2)/b^4 - 41/b^4) + 171/b^4) - 745/b^4)*(b*x + 2) + 965/b^4)*sqrt((b*x + 2) *b - 2*b)*sqrt(b*x + 2) + 630*log(abs(-sqrt(b*x + 2)*sqrt(b) + sqrt((b*x + 2)*b - 2*b)))/b^(7/2))*abs(b) + 120*(((b*x + 2)*(2*(b*x + 2)*(3*(b*x + 2) /b^3 - 25/b^3) + 163/b^3) - 279/b^3)*sqrt((b*x + 2)*b - 2*b)*sqrt(b*x + 2) - 210*log(abs(-sqrt(b*x + 2)*sqrt(b) + sqrt((b*x + 2)*b - 2*b)))/b^(5/2)) *abs(b)/b + 320*(sqrt((b*x + 2)*b - 2*b)*sqrt(b*x + 2)*((b*x + 2)*(2*(b*x + 2)/b^2 - 13/b^2) + 33/b^2) + 30*log(abs(-sqrt(b*x + 2)*sqrt(b) + sqrt((b *x + 2)*b - 2*b)))/b^(3/2))*abs(b)/b^2)/b
Timed out. \[ \int x^{5/2} (2+b x)^{5/2} \, dx=\int x^{5/2}\,{\left (b\,x+2\right )}^{5/2} \,d x \]