3.6.4 \(\int \frac {\sqrt {a-b x}}{x^{9/2}} \, dx\) [504]

Optimal. Leaf size=71 \[ -\frac {2 (a-b x)^{3/2}}{7 a x^{7/2}}-\frac {8 b (a-b x)^{3/2}}{35 a^2 x^{5/2}}-\frac {16 b^2 (a-b x)^{3/2}}{105 a^3 x^{3/2}} \]

[Out]

-2/7*(-b*x+a)^(3/2)/a/x^(7/2)-8/35*b*(-b*x+a)^(3/2)/a^2/x^(5/2)-16/105*b^2*(-b*x+a)^(3/2)/a^3/x^(3/2)

________________________________________________________________________________________

Rubi [A]
time = 0.01, antiderivative size = 71, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 2, integrand size = 16, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.125, Rules used = {47, 37} \begin {gather*} -\frac {16 b^2 (a-b x)^{3/2}}{105 a^3 x^{3/2}}-\frac {8 b (a-b x)^{3/2}}{35 a^2 x^{5/2}}-\frac {2 (a-b x)^{3/2}}{7 a x^{7/2}} \end {gather*}

Antiderivative was successfully verified.

[In]

Int[Sqrt[a - b*x]/x^(9/2),x]

[Out]

(-2*(a - b*x)^(3/2))/(7*a*x^(7/2)) - (8*b*(a - b*x)^(3/2))/(35*a^2*x^(5/2)) - (16*b^2*(a - b*x)^(3/2))/(105*a^
3*x^(3/2))

Rule 37

Int[((a_.) + (b_.)*(x_))^(m_.)*((c_.) + (d_.)*(x_))^(n_), x_Symbol] :> Simp[(a + b*x)^(m + 1)*((c + d*x)^(n +
1)/((b*c - a*d)*(m + 1))), x] /; FreeQ[{a, b, c, d, m, n}, x] && NeQ[b*c - a*d, 0] && EqQ[m + n + 2, 0] && NeQ
[m, -1]

Rule 47

Int[((a_.) + (b_.)*(x_))^(m_)*((c_.) + (d_.)*(x_))^(n_), x_Symbol] :> Simp[(a + b*x)^(m + 1)*((c + d*x)^(n + 1
)/((b*c - a*d)*(m + 1))), x] - Dist[d*(Simplify[m + n + 2]/((b*c - a*d)*(m + 1))), Int[(a + b*x)^Simplify[m +
1]*(c + d*x)^n, x], x] /; FreeQ[{a, b, c, d, m, n}, x] && NeQ[b*c - a*d, 0] && ILtQ[Simplify[m + n + 2], 0] &&
NeQ[m, -1] &&  !(LtQ[m, -1] && LtQ[n, -1] && (EqQ[a, 0] || (NeQ[c, 0] && LtQ[m - n, 0] && IntegerQ[n]))) && (
SumSimplerQ[m, 1] ||  !SumSimplerQ[n, 1])

Rubi steps

\begin {align*} \int \frac {\sqrt {a-b x}}{x^{9/2}} \, dx &=-\frac {2 (a-b x)^{3/2}}{7 a x^{7/2}}+\frac {(4 b) \int \frac {\sqrt {a-b x}}{x^{7/2}} \, dx}{7 a}\\ &=-\frac {2 (a-b x)^{3/2}}{7 a x^{7/2}}-\frac {8 b (a-b x)^{3/2}}{35 a^2 x^{5/2}}+\frac {\left (8 b^2\right ) \int \frac {\sqrt {a-b x}}{x^{5/2}} \, dx}{35 a^2}\\ &=-\frac {2 (a-b x)^{3/2}}{7 a x^{7/2}}-\frac {8 b (a-b x)^{3/2}}{35 a^2 x^{5/2}}-\frac {16 b^2 (a-b x)^{3/2}}{105 a^3 x^{3/2}}\\ \end {align*}

________________________________________________________________________________________

Mathematica [A]
time = 0.08, size = 52, normalized size = 0.73 \begin {gather*} -\frac {2 \sqrt {a-b x} \left (15 a^3-3 a^2 b x-4 a b^2 x^2-8 b^3 x^3\right )}{105 a^3 x^{7/2}} \end {gather*}

Antiderivative was successfully verified.

[In]

Integrate[Sqrt[a - b*x]/x^(9/2),x]

[Out]

(-2*Sqrt[a - b*x]*(15*a^3 - 3*a^2*b*x - 4*a*b^2*x^2 - 8*b^3*x^3))/(105*a^3*x^(7/2))

________________________________________________________________________________________

Mathics [C] Result contains higher order function than in optimal. Order 9 vs. order 2 in optimal.
time = 45.14, size = 461, normalized size = 6.49 \begin {gather*} \text {Piecewise}\left [\left \{\left \{\frac {2 \sqrt {b} \left (-15 a^5+33 a^4 b x-17 a^3 b^2 x^2+3 a^2 b^3 x^3-12 a b^4 x^4+8 b^5 x^5\right ) \sqrt {\frac {a-b x}{b x}}}{105 a^3 x^3 \left (a^2-2 a b x+b^2 x^2\right )},\text {Abs}\left [\frac {a}{b x}\right ]>1\right \}\right \},\frac {-30 I a^5 b^{\frac {9}{2}} \sqrt {1-\frac {a}{b x}}}{105 a^5 b^4 x^3-210 a^4 b^5 x^4+105 a^3 b^6 x^5}+\frac {I 66 a^4 b^{\frac {11}{2}} x \sqrt {1-\frac {a}{b x}}}{105 a^5 b^4 x^3-210 a^4 b^5 x^4+105 a^3 b^6 x^5}-\frac {34 I a^3 b^{\frac {13}{2}} x^2 \sqrt {1-\frac {a}{b x}}}{105 a^5 b^4 x^3-210 a^4 b^5 x^4+105 a^3 b^6 x^5}+\frac {I 6 a^2 b^{\frac {15}{2}} x^3 \sqrt {1-\frac {a}{b x}}}{105 a^5 b^4 x^3-210 a^4 b^5 x^4+105 a^3 b^6 x^5}-\frac {24 I a b^{\frac {17}{2}} x^4 \sqrt {1-\frac {a}{b x}}}{105 a^5 b^4 x^3-210 a^4 b^5 x^4+105 a^3 b^6 x^5}+\frac {I 16 b^{\frac {19}{2}} x^5 \sqrt {1-\frac {a}{b x}}}{105 a^5 b^4 x^3-210 a^4 b^5 x^4+105 a^3 b^6 x^5}\right ] \end {gather*}

Warning: Unable to verify antiderivative.

[In]

mathics('Integrate[Sqrt[a - b*x]/x^(9/2),x]')

[Out]

Piecewise[{{2 Sqrt[b] (-15 a ^ 5 + 33 a ^ 4 b x - 17 a ^ 3 b ^ 2 x ^ 2 + 3 a ^ 2 b ^ 3 x ^ 3 - 12 a b ^ 4 x ^
4 + 8 b ^ 5 x ^ 5) Sqrt[(a - b x) / (b x)] / (105 a ^ 3 x ^ 3 (a ^ 2 - 2 a b x + b ^ 2 x ^ 2)), Abs[a / (b x)]
> 1}}, -30 I a ^ 5 b ^ (9 / 2) Sqrt[1 - a / (b x)] / (105 a ^ 5 b ^ 4 x ^ 3 - 210 a ^ 4 b ^ 5 x ^ 4 + 105 a ^
3 b ^ 6 x ^ 5) + I 66 a ^ 4 b ^ (11 / 2) x Sqrt[1 - a / (b x)] / (105 a ^ 5 b ^ 4 x ^ 3 - 210 a ^ 4 b ^ 5 x ^
4 + 105 a ^ 3 b ^ 6 x ^ 5) - 34 I a ^ 3 b ^ (13 / 2) x ^ 2 Sqrt[1 - a / (b x)] / (105 a ^ 5 b ^ 4 x ^ 3 - 210
a ^ 4 b ^ 5 x ^ 4 + 105 a ^ 3 b ^ 6 x ^ 5) + I 6 a ^ 2 b ^ (15 / 2) x ^ 3 Sqrt[1 - a / (b x)] / (105 a ^ 5 b
^ 4 x ^ 3 - 210 a ^ 4 b ^ 5 x ^ 4 + 105 a ^ 3 b ^ 6 x ^ 5) - 24 I a b ^ (17 / 2) x ^ 4 Sqrt[1 - a / (b x)] / (
105 a ^ 5 b ^ 4 x ^ 3 - 210 a ^ 4 b ^ 5 x ^ 4 + 105 a ^ 3 b ^ 6 x ^ 5) + I 16 b ^ (19 / 2) x ^ 5 Sqrt[1 - a /
(b x)] / (105 a ^ 5 b ^ 4 x ^ 3 - 210 a ^ 4 b ^ 5 x ^ 4 + 105 a ^ 3 b ^ 6 x ^ 5)]

________________________________________________________________________________________

Maple [A]
time = 0.10, size = 98, normalized size = 1.38

method	result	size
gosper	\(-\frac {2 \left (-b x +a \right )^{\frac {3}{2}} \left (8 x^{2} b^{2}+12 a b x +15 a^{2}\right )}{105 x^{\frac {7}{2}} a^{3}}\)	\(36\)
risch	\(-\frac {2 \sqrt {-b x +a}\, \left (-8 b^{3} x^{3}-4 a \,b^{2} x^{2}-3 a^{2} b x +15 a^{3}\right )}{105 x^{\frac {7}{2}} a^{3}}\)	\(47\)
default	\(-\frac {\sqrt {-b x +a}}{3 x^{\frac {7}{2}}}-\frac {a \left (-\frac {2 \sqrt {-b x +a}}{7 a \,x^{\frac {7}{2}}}+\frac {6 b \left (-\frac {2 \sqrt {-b x +a}}{5 a \,x^{\frac {5}{2}}}+\frac {4 b \left (-\frac {2 \sqrt {-b x +a}}{3 a \,x^{\frac {3}{2}}}-\frac {4 b \sqrt {-b x +a}}{3 a^{2} \sqrt {x}}\right )}{5 a}\right )}{7 a}\right )}{6}\)	\(98\)

Verification of antiderivative is not currently implemented for this CAS.

[In]

int((-b*x+a)^(1/2)/x^(9/2),x,method=_RETURNVERBOSE)

[Out]

-1/3*(-b*x+a)^(1/2)/x^(7/2)-1/6*a*(-2/7/a/x^(7/2)*(-b*x+a)^(1/2)+6/7*b/a*(-2/5/a/x^(5/2)*(-b*x+a)^(1/2)+4/5*b/
a*(-2/3*(-b*x+a)^(1/2)/a/x^(3/2)-4/3*b*(-b*x+a)^(1/2)/a^2/x^(1/2))))

________________________________________________________________________________________

Maxima [A]
time = 0.28, size = 49, normalized size = 0.69 \begin {gather*} -\frac {2 \, {\left (\frac {35 \, {\left (-b x + a\right )}^{\frac {3}{2}} b^{2}}{x^{\frac {3}{2}}} + \frac {42 \, {\left (-b x + a\right )}^{\frac {5}{2}} b}{x^{\frac {5}{2}}} + \frac {15 \, {\left (-b x + a\right )}^{\frac {7}{2}}}{x^{\frac {7}{2}}}\right )}}{105 \, a^{3}} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((-b*x+a)^(1/2)/x^(9/2),x, algorithm="maxima")

[Out]

-2/105*(35*(-b*x + a)^(3/2)*b^2/x^(3/2) + 42*(-b*x + a)^(5/2)*b/x^(5/2) + 15*(-b*x + a)^(7/2)/x^(7/2))/a^3

________________________________________________________________________________________

Fricas [A]
time = 0.31, size = 46, normalized size = 0.65 \begin {gather*} \frac {2 \, {\left (8 \, b^{3} x^{3} + 4 \, a b^{2} x^{2} + 3 \, a^{2} b x - 15 \, a^{3}\right )} \sqrt {-b x + a}}{105 \, a^{3} x^{\frac {7}{2}}} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((-b*x+a)^(1/2)/x^(9/2),x, algorithm="fricas")

[Out]

2/105*(8*b^3*x^3 + 4*a*b^2*x^2 + 3*a^2*b*x - 15*a^3)*sqrt(-b*x + a)/(a^3*x^(7/2))

________________________________________________________________________________________

Sympy [C] Result contains complex when optimal does not.
time = 11.98, size = 707, normalized size = 9.96 \begin {gather*} \begin {cases} - \frac {30 a^{5} b^{\frac {9}{2}} \sqrt {\frac {a}{b x} - 1}}{105 a^{5} b^{4} x^{3} - 210 a^{4} b^{5} x^{4} + 105 a^{3} b^{6} x^{5}} + \frac {66 a^{4} b^{\frac {11}{2}} x \sqrt {\frac {a}{b x} - 1}}{105 a^{5} b^{4} x^{3} - 210 a^{4} b^{5} x^{4} + 105 a^{3} b^{6} x^{5}} - \frac {34 a^{3} b^{\frac {13}{2}} x^{2} \sqrt {\frac {a}{b x} - 1}}{105 a^{5} b^{4} x^{3} - 210 a^{4} b^{5} x^{4} + 105 a^{3} b^{6} x^{5}} + \frac {6 a^{2} b^{\frac {15}{2}} x^{3} \sqrt {\frac {a}{b x} - 1}}{105 a^{5} b^{4} x^{3} - 210 a^{4} b^{5} x^{4} + 105 a^{3} b^{6} x^{5}} - \frac {24 a b^{\frac {17}{2}} x^{4} \sqrt {\frac {a}{b x} - 1}}{105 a^{5} b^{4} x^{3} - 210 a^{4} b^{5} x^{4} + 105 a^{3} b^{6} x^{5}} + \frac {16 b^{\frac {19}{2}} x^{5} \sqrt {\frac {a}{b x} - 1}}{105 a^{5} b^{4} x^{3} - 210 a^{4} b^{5} x^{4} + 105 a^{3} b^{6} x^{5}} & \text {for}\: \left |{\frac {a}{b x}}\right | > 1 \\- \frac {30 i a^{5} b^{\frac {9}{2}} \sqrt {- \frac {a}{b x} + 1}}{105 a^{5} b^{4} x^{3} - 210 a^{4} b^{5} x^{4} + 105 a^{3} b^{6} x^{5}} + \frac {66 i a^{4} b^{\frac {11}{2}} x \sqrt {- \frac {a}{b x} + 1}}{105 a^{5} b^{4} x^{3} - 210 a^{4} b^{5} x^{4} + 105 a^{3} b^{6} x^{5}} - \frac {34 i a^{3} b^{\frac {13}{2}} x^{2} \sqrt {- \frac {a}{b x} + 1}}{105 a^{5} b^{4} x^{3} - 210 a^{4} b^{5} x^{4} + 105 a^{3} b^{6} x^{5}} + \frac {6 i a^{2} b^{\frac {15}{2}} x^{3} \sqrt {- \frac {a}{b x} + 1}}{105 a^{5} b^{4} x^{3} - 210 a^{4} b^{5} x^{4} + 105 a^{3} b^{6} x^{5}} - \frac {24 i a b^{\frac {17}{2}} x^{4} \sqrt {- \frac {a}{b x} + 1}}{105 a^{5} b^{4} x^{3} - 210 a^{4} b^{5} x^{4} + 105 a^{3} b^{6} x^{5}} + \frac {16 i b^{\frac {19}{2}} x^{5} \sqrt {- \frac {a}{b x} + 1}}{105 a^{5} b^{4} x^{3} - 210 a^{4} b^{5} x^{4} + 105 a^{3} b^{6} x^{5}} & \text {otherwise} \end {cases} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((-b*x+a)**(1/2)/x**(9/2),x)

[Out]

Piecewise((-30*a**5*b**(9/2)*sqrt(a/(b*x) - 1)/(105*a**5*b**4*x**3 - 210*a**4*b**5*x**4 + 105*a**3*b**6*x**5)
+ 66*a**4*b**(11/2)*x*sqrt(a/(b*x) - 1)/(105*a**5*b**4*x**3 - 210*a**4*b**5*x**4 + 105*a**3*b**6*x**5) - 34*a*
*3*b**(13/2)*x**2*sqrt(a/(b*x) - 1)/(105*a**5*b**4*x**3 - 210*a**4*b**5*x**4 + 105*a**3*b**6*x**5) + 6*a**2*b*
*(15/2)*x**3*sqrt(a/(b*x) - 1)/(105*a**5*b**4*x**3 - 210*a**4*b**5*x**4 + 105*a**3*b**6*x**5) - 24*a*b**(17/2)
*x**4*sqrt(a/(b*x) - 1)/(105*a**5*b**4*x**3 - 210*a**4*b**5*x**4 + 105*a**3*b**6*x**5) + 16*b**(19/2)*x**5*sqr
t(a/(b*x) - 1)/(105*a**5*b**4*x**3 - 210*a**4*b**5*x**4 + 105*a**3*b**6*x**5), Abs(a/(b*x)) > 1), (-30*I*a**5*
b**(9/2)*sqrt(-a/(b*x) + 1)/(105*a**5*b**4*x**3 - 210*a**4*b**5*x**4 + 105*a**3*b**6*x**5) + 66*I*a**4*b**(11/
2)*x*sqrt(-a/(b*x) + 1)/(105*a**5*b**4*x**3 - 210*a**4*b**5*x**4 + 105*a**3*b**6*x**5) - 34*I*a**3*b**(13/2)*x
**2*sqrt(-a/(b*x) + 1)/(105*a**5*b**4*x**3 - 210*a**4*b**5*x**4 + 105*a**3*b**6*x**5) + 6*I*a**2*b**(15/2)*x**
3*sqrt(-a/(b*x) + 1)/(105*a**5*b**4*x**3 - 210*a**4*b**5*x**4 + 105*a**3*b**6*x**5) - 24*I*a*b**(17/2)*x**4*sq
rt(-a/(b*x) + 1)/(105*a**5*b**4*x**3 - 210*a**4*b**5*x**4 + 105*a**3*b**6*x**5) + 16*I*b**(19/2)*x**5*sqrt(-a/
(b*x) + 1)/(105*a**5*b**4*x**3 - 210*a**4*b**5*x**4 + 105*a**3*b**6*x**5), True))

________________________________________________________________________________________

Giac [A]
time = 0.01, size = 158, normalized size = 2.23 \begin {gather*} \frac {2 b^{2} \left (\left (-\frac {\frac {1}{3675}\cdot 280 b^{7} \sqrt {a-b x} \sqrt {a-b x}}{a^{3}}+\frac {\frac {1}{3675}\cdot 980 b^{7} a}{a^{3}}\right ) \sqrt {a-b x} \sqrt {a-b x}-\frac {\frac {1}{3675}\cdot 1225 b^{7} a^{2}}{a^{3}}\right ) \sqrt {a-b x} \sqrt {a-b x} \sqrt {a-b x} \sqrt {a b-b \left (a-b x\right )}}{\left |b\right | b \left (a b-b \left (a-b x\right )\right )^{4}} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((-b*x+a)^(1/2)/x^(9/2),x)

[Out]

2/105*(35*b^7/a + 4*(2*(b*x - a)*b^7/a^3 + 7*b^7/a^2)*(b*x - a))*(b*x - a)*sqrt(-b*x + a)*b/(((b*x - a)*b + a*
b)^(7/2)*abs(b))

________________________________________________________________________________________

Mupad [B]
time = 0.27, size = 43, normalized size = 0.61 \begin {gather*} \frac {\sqrt {a-b\,x}\,\left (\frac {8\,b^2\,x^2}{105\,a^2}+\frac {16\,b^3\,x^3}{105\,a^3}+\frac {2\,b\,x}{35\,a}-\frac {2}{7}\right )}{x^{7/2}} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int((a - b*x)^(1/2)/x^(9/2),x)

[Out]

((a - b*x)^(1/2)*((8*b^2*x^2)/(105*a^2) + (16*b^3*x^3)/(105*a^3) + (2*b*x)/(35*a) - 2/7))/x^(7/2)

________________________________________________________________________________________