Integrand size = 13, antiderivative size = 72 \[ \int x^3 (a+b x)^{9/2} \, dx=-\frac {2 a^3 (a+b x)^{11/2}}{11 b^4}+\frac {6 a^2 (a+b x)^{13/2}}{13 b^4}-\frac {2 a (a+b x)^{15/2}}{5 b^4}+\frac {2 (a+b x)^{17/2}}{17 b^4} \]
-2/11*a^3*(b*x+a)^(11/2)/b^4+6/13*a^2*(b*x+a)^(13/2)/b^4-2/5*a*(b*x+a)^(15 /2)/b^4+2/17*(b*x+a)^(17/2)/b^4
Time = 0.03 (sec) , antiderivative size = 46, normalized size of antiderivative = 0.64 \[ \int x^3 (a+b x)^{9/2} \, dx=\frac {2 (a+b x)^{11/2} \left (-16 a^3+88 a^2 b x-286 a b^2 x^2+715 b^3 x^3\right )}{12155 b^4} \]
Time = 0.19 (sec) , antiderivative size = 72, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.154, Rules used = {53, 2009}
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.
\(\displaystyle \int x^3 (a+b x)^{9/2} \, dx\) |
\(\Big \downarrow \) 53 |
\(\displaystyle \int \left (-\frac {a^3 (a+b x)^{9/2}}{b^3}+\frac {3 a^2 (a+b x)^{11/2}}{b^3}+\frac {(a+b x)^{15/2}}{b^3}-\frac {3 a (a+b x)^{13/2}}{b^3}\right )dx\) |
\(\Big \downarrow \) 2009 |
\(\displaystyle -\frac {2 a^3 (a+b x)^{11/2}}{11 b^4}+\frac {6 a^2 (a+b x)^{13/2}}{13 b^4}+\frac {2 (a+b x)^{17/2}}{17 b^4}-\frac {2 a (a+b x)^{15/2}}{5 b^4}\) |
(-2*a^3*(a + b*x)^(11/2))/(11*b^4) + (6*a^2*(a + b*x)^(13/2))/(13*b^4) - ( 2*a*(a + b*x)^(15/2))/(5*b^4) + (2*(a + b*x)^(17/2))/(17*b^4)
3.4.13.3.1 Defintions of rubi rules used
Int[((a_.) + (b_.)*(x_))^(m_.)*((c_.) + (d_.)*(x_))^(n_.), x_Symbol] :> Int [ExpandIntegrand[(a + b*x)^m*(c + d*x)^n, x], x] /; FreeQ[{a, b, c, d, n}, x] && IGtQ[m, 0] && ( !IntegerQ[n] || (EqQ[c, 0] && LeQ[7*m + 4*n + 4, 0]) || LtQ[9*m + 5*(n + 1), 0] || GtQ[m + n + 2, 0])
Time = 0.10 (sec) , antiderivative size = 43, normalized size of antiderivative = 0.60
method | result | size |
gosper | \(-\frac {2 \left (b x +a \right )^{\frac {11}{2}} \left (-715 b^{3} x^{3}+286 a \,b^{2} x^{2}-88 a^{2} b x +16 a^{3}\right )}{12155 b^{4}}\) | \(43\) |
pseudoelliptic | \(-\frac {2 \left (b x +a \right )^{\frac {11}{2}} \left (-715 b^{3} x^{3}+286 a \,b^{2} x^{2}-88 a^{2} b x +16 a^{3}\right )}{12155 b^{4}}\) | \(43\) |
derivativedivides | \(\frac {\frac {2 \left (b x +a \right )^{\frac {17}{2}}}{17}-\frac {2 a \left (b x +a \right )^{\frac {15}{2}}}{5}+\frac {6 a^{2} \left (b x +a \right )^{\frac {13}{2}}}{13}-\frac {2 a^{3} \left (b x +a \right )^{\frac {11}{2}}}{11}}{b^{4}}\) | \(50\) |
default | \(\frac {\frac {2 \left (b x +a \right )^{\frac {17}{2}}}{17}-\frac {2 a \left (b x +a \right )^{\frac {15}{2}}}{5}+\frac {6 a^{2} \left (b x +a \right )^{\frac {13}{2}}}{13}-\frac {2 a^{3} \left (b x +a \right )^{\frac {11}{2}}}{11}}{b^{4}}\) | \(50\) |
trager | \(-\frac {2 \left (-715 b^{8} x^{8}-3289 a \,x^{7} b^{7}-5808 a^{2} x^{6} b^{6}-4714 a^{3} x^{5} b^{5}-1515 a^{4} x^{4} b^{4}-5 a^{5} b^{3} x^{3}+6 a^{6} x^{2} b^{2}-8 a^{7} x b +16 a^{8}\right ) \sqrt {b x +a}}{12155 b^{4}}\) | \(98\) |
risch | \(-\frac {2 \left (-715 b^{8} x^{8}-3289 a \,x^{7} b^{7}-5808 a^{2} x^{6} b^{6}-4714 a^{3} x^{5} b^{5}-1515 a^{4} x^{4} b^{4}-5 a^{5} b^{3} x^{3}+6 a^{6} x^{2} b^{2}-8 a^{7} x b +16 a^{8}\right ) \sqrt {b x +a}}{12155 b^{4}}\) | \(98\) |
Time = 0.22 (sec) , antiderivative size = 97, normalized size of antiderivative = 1.35 \[ \int x^3 (a+b x)^{9/2} \, dx=\frac {2 \, {\left (715 \, b^{8} x^{8} + 3289 \, a b^{7} x^{7} + 5808 \, a^{2} b^{6} x^{6} + 4714 \, a^{3} b^{5} x^{5} + 1515 \, a^{4} b^{4} x^{4} + 5 \, a^{5} b^{3} x^{3} - 6 \, a^{6} b^{2} x^{2} + 8 \, a^{7} b x - 16 \, a^{8}\right )} \sqrt {b x + a}}{12155 \, b^{4}} \]
2/12155*(715*b^8*x^8 + 3289*a*b^7*x^7 + 5808*a^2*b^6*x^6 + 4714*a^3*b^5*x^ 5 + 1515*a^4*b^4*x^4 + 5*a^5*b^3*x^3 - 6*a^6*b^2*x^2 + 8*a^7*b*x - 16*a^8) *sqrt(b*x + a)/b^4
Leaf count of result is larger than twice the leaf count of optimal. 190 vs. \(2 (68) = 136\).
Time = 1.34 (sec) , antiderivative size = 190, normalized size of antiderivative = 2.64 \[ \int x^3 (a+b x)^{9/2} \, dx=\begin {cases} - \frac {32 a^{8} \sqrt {a + b x}}{12155 b^{4}} + \frac {16 a^{7} x \sqrt {a + b x}}{12155 b^{3}} - \frac {12 a^{6} x^{2} \sqrt {a + b x}}{12155 b^{2}} + \frac {2 a^{5} x^{3} \sqrt {a + b x}}{2431 b} + \frac {606 a^{4} x^{4} \sqrt {a + b x}}{2431} + \frac {9428 a^{3} b x^{5} \sqrt {a + b x}}{12155} + \frac {1056 a^{2} b^{2} x^{6} \sqrt {a + b x}}{1105} + \frac {46 a b^{3} x^{7} \sqrt {a + b x}}{85} + \frac {2 b^{4} x^{8} \sqrt {a + b x}}{17} & \text {for}\: b \neq 0 \\\frac {a^{\frac {9}{2}} x^{4}}{4} & \text {otherwise} \end {cases} \]
Piecewise((-32*a**8*sqrt(a + b*x)/(12155*b**4) + 16*a**7*x*sqrt(a + b*x)/( 12155*b**3) - 12*a**6*x**2*sqrt(a + b*x)/(12155*b**2) + 2*a**5*x**3*sqrt(a + b*x)/(2431*b) + 606*a**4*x**4*sqrt(a + b*x)/2431 + 9428*a**3*b*x**5*sqr t(a + b*x)/12155 + 1056*a**2*b**2*x**6*sqrt(a + b*x)/1105 + 46*a*b**3*x**7 *sqrt(a + b*x)/85 + 2*b**4*x**8*sqrt(a + b*x)/17, Ne(b, 0)), (a**(9/2)*x** 4/4, True))
Time = 0.23 (sec) , antiderivative size = 56, normalized size of antiderivative = 0.78 \[ \int x^3 (a+b x)^{9/2} \, dx=\frac {2 \, {\left (b x + a\right )}^{\frac {17}{2}}}{17 \, b^{4}} - \frac {2 \, {\left (b x + a\right )}^{\frac {15}{2}} a}{5 \, b^{4}} + \frac {6 \, {\left (b x + a\right )}^{\frac {13}{2}} a^{2}}{13 \, b^{4}} - \frac {2 \, {\left (b x + a\right )}^{\frac {11}{2}} a^{3}}{11 \, b^{4}} \]
2/17*(b*x + a)^(17/2)/b^4 - 2/5*(b*x + a)^(15/2)*a/b^4 + 6/13*(b*x + a)^(1 3/2)*a^2/b^4 - 2/11*(b*x + a)^(11/2)*a^3/b^4
Leaf count of result is larger than twice the leaf count of optimal. 493 vs. \(2 (56) = 112\).
Time = 0.30 (sec) , antiderivative size = 493, normalized size of antiderivative = 6.85 \[ \int x^3 (a+b x)^{9/2} \, dx=\frac {2 \, {\left (\frac {21879 \, {\left (5 \, {\left (b x + a\right )}^{\frac {7}{2}} - 21 \, {\left (b x + a\right )}^{\frac {5}{2}} a + 35 \, {\left (b x + a\right )}^{\frac {3}{2}} a^{2} - 35 \, \sqrt {b x + a} a^{3}\right )} a^{5}}{b^{3}} + \frac {12155 \, {\left (35 \, {\left (b x + a\right )}^{\frac {9}{2}} - 180 \, {\left (b x + a\right )}^{\frac {7}{2}} a + 378 \, {\left (b x + a\right )}^{\frac {5}{2}} a^{2} - 420 \, {\left (b x + a\right )}^{\frac {3}{2}} a^{3} + 315 \, \sqrt {b x + a} a^{4}\right )} a^{4}}{b^{3}} + \frac {11050 \, {\left (63 \, {\left (b x + a\right )}^{\frac {11}{2}} - 385 \, {\left (b x + a\right )}^{\frac {9}{2}} a + 990 \, {\left (b x + a\right )}^{\frac {7}{2}} a^{2} - 1386 \, {\left (b x + a\right )}^{\frac {5}{2}} a^{3} + 1155 \, {\left (b x + a\right )}^{\frac {3}{2}} a^{4} - 693 \, \sqrt {b x + a} a^{5}\right )} a^{3}}{b^{3}} + \frac {2550 \, {\left (231 \, {\left (b x + a\right )}^{\frac {13}{2}} - 1638 \, {\left (b x + a\right )}^{\frac {11}{2}} a + 5005 \, {\left (b x + a\right )}^{\frac {9}{2}} a^{2} - 8580 \, {\left (b x + a\right )}^{\frac {7}{2}} a^{3} + 9009 \, {\left (b x + a\right )}^{\frac {5}{2}} a^{4} - 6006 \, {\left (b x + a\right )}^{\frac {3}{2}} a^{5} + 3003 \, \sqrt {b x + a} a^{6}\right )} a^{2}}{b^{3}} + \frac {595 \, {\left (429 \, {\left (b x + a\right )}^{\frac {15}{2}} - 3465 \, {\left (b x + a\right )}^{\frac {13}{2}} a + 12285 \, {\left (b x + a\right )}^{\frac {11}{2}} a^{2} - 25025 \, {\left (b x + a\right )}^{\frac {9}{2}} a^{3} + 32175 \, {\left (b x + a\right )}^{\frac {7}{2}} a^{4} - 27027 \, {\left (b x + a\right )}^{\frac {5}{2}} a^{5} + 15015 \, {\left (b x + a\right )}^{\frac {3}{2}} a^{6} - 6435 \, \sqrt {b x + a} a^{7}\right )} a}{b^{3}} + \frac {7 \, {\left (6435 \, {\left (b x + a\right )}^{\frac {17}{2}} - 58344 \, {\left (b x + a\right )}^{\frac {15}{2}} a + 235620 \, {\left (b x + a\right )}^{\frac {13}{2}} a^{2} - 556920 \, {\left (b x + a\right )}^{\frac {11}{2}} a^{3} + 850850 \, {\left (b x + a\right )}^{\frac {9}{2}} a^{4} - 875160 \, {\left (b x + a\right )}^{\frac {7}{2}} a^{5} + 612612 \, {\left (b x + a\right )}^{\frac {5}{2}} a^{6} - 291720 \, {\left (b x + a\right )}^{\frac {3}{2}} a^{7} + 109395 \, \sqrt {b x + a} a^{8}\right )}}{b^{3}}\right )}}{765765 \, b} \]
2/765765*(21879*(5*(b*x + a)^(7/2) - 21*(b*x + a)^(5/2)*a + 35*(b*x + a)^( 3/2)*a^2 - 35*sqrt(b*x + a)*a^3)*a^5/b^3 + 12155*(35*(b*x + a)^(9/2) - 180 *(b*x + a)^(7/2)*a + 378*(b*x + a)^(5/2)*a^2 - 420*(b*x + a)^(3/2)*a^3 + 3 15*sqrt(b*x + a)*a^4)*a^4/b^3 + 11050*(63*(b*x + a)^(11/2) - 385*(b*x + a) ^(9/2)*a + 990*(b*x + a)^(7/2)*a^2 - 1386*(b*x + a)^(5/2)*a^3 + 1155*(b*x + a)^(3/2)*a^4 - 693*sqrt(b*x + a)*a^5)*a^3/b^3 + 2550*(231*(b*x + a)^(13/ 2) - 1638*(b*x + a)^(11/2)*a + 5005*(b*x + a)^(9/2)*a^2 - 8580*(b*x + a)^( 7/2)*a^3 + 9009*(b*x + a)^(5/2)*a^4 - 6006*(b*x + a)^(3/2)*a^5 + 3003*sqrt (b*x + a)*a^6)*a^2/b^3 + 595*(429*(b*x + a)^(15/2) - 3465*(b*x + a)^(13/2) *a + 12285*(b*x + a)^(11/2)*a^2 - 25025*(b*x + a)^(9/2)*a^3 + 32175*(b*x + a)^(7/2)*a^4 - 27027*(b*x + a)^(5/2)*a^5 + 15015*(b*x + a)^(3/2)*a^6 - 64 35*sqrt(b*x + a)*a^7)*a/b^3 + 7*(6435*(b*x + a)^(17/2) - 58344*(b*x + a)^( 15/2)*a + 235620*(b*x + a)^(13/2)*a^2 - 556920*(b*x + a)^(11/2)*a^3 + 8508 50*(b*x + a)^(9/2)*a^4 - 875160*(b*x + a)^(7/2)*a^5 + 612612*(b*x + a)^(5/ 2)*a^6 - 291720*(b*x + a)^(3/2)*a^7 + 109395*sqrt(b*x + a)*a^8)/b^3)/b
Time = 0.07 (sec) , antiderivative size = 56, normalized size of antiderivative = 0.78 \[ \int x^3 (a+b x)^{9/2} \, dx=\frac {2\,{\left (a+b\,x\right )}^{17/2}}{17\,b^4}-\frac {2\,a^3\,{\left (a+b\,x\right )}^{11/2}}{11\,b^4}+\frac {6\,a^2\,{\left (a+b\,x\right )}^{13/2}}{13\,b^4}-\frac {2\,a\,{\left (a+b\,x\right )}^{15/2}}{5\,b^4} \]