3.7.6 \(\int \frac {1}{x^{3/2} (a-b x)^{5/2}} \, dx\) [606]

Optimal. Leaf size=67 \[ \frac {2}{3 a \sqrt {x} (a-b x)^{3/2}}+\frac {8}{3 a^2 \sqrt {x} \sqrt {a-b x}}-\frac {16 \sqrt {a-b x}}{3 a^3 \sqrt {x}} \]

[Out]

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

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Rubi [A]
time = 0.01, antiderivative size = 67, 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 \sqrt {a-b x}}{3 a^3 \sqrt {x}}+\frac {8}{3 a^2 \sqrt {x} \sqrt {a-b x}}+\frac {2}{3 a \sqrt {x} (a-b x)^{3/2}} \end {gather*}

Antiderivative was successfully verified.

[In]

Int[1/(x^(3/2)*(a - b*x)^(5/2)),x]

[Out]

2/(3*a*Sqrt[x]*(a - b*x)^(3/2)) + 8/(3*a^2*Sqrt[x]*Sqrt[a - b*x]) - (16*Sqrt[a - b*x])/(3*a^3*Sqrt[x])

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 {1}{x^{3/2} (a-b x)^{5/2}} \, dx &=\frac {2}{3 a \sqrt {x} (a-b x)^{3/2}}+\frac {4 \int \frac {1}{x^{3/2} (a-b x)^{3/2}} \, dx}{3 a}\\ &=\frac {2}{3 a \sqrt {x} (a-b x)^{3/2}}+\frac {8}{3 a^2 \sqrt {x} \sqrt {a-b x}}+\frac {8 \int \frac {1}{x^{3/2} \sqrt {a-b x}} \, dx}{3 a^2}\\ &=\frac {2}{3 a \sqrt {x} (a-b x)^{3/2}}+\frac {8}{3 a^2 \sqrt {x} \sqrt {a-b x}}-\frac {16 \sqrt {a-b x}}{3 a^3 \sqrt {x}}\\ \end {align*}

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Mathematica [A]
time = 0.09, size = 41, normalized size = 0.61 \begin {gather*} -\frac {2 \left (3 a^2-12 a b x+8 b^2 x^2\right )}{3 a^3 \sqrt {x} (a-b x)^{3/2}} \end {gather*}

Antiderivative was successfully verified.

[In]

Integrate[1/(x^(3/2)*(a - b*x)^(5/2)),x]

[Out]

(-2*(3*a^2 - 12*a*b*x + 8*b^2*x^2))/(3*a^3*Sqrt[x]*(a - b*x)^(3/2))

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Mathics [C] Result contains higher order function than in optimal. Order 9 vs. order 2 in optimal.
time = 5.42, size = 229, normalized size = 3.42 \begin {gather*} \text {Piecewise}\left [\left \{\left \{\frac {\sqrt {b} \left (-2 a^2+8 a b x-\frac {16 b^2 x^2}{3}\right ) \sqrt {\frac {a-b x}{b x}}}{a^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 {-6 I a^2 b^{\frac {9}{2}} \sqrt {1-\frac {a}{b x}}}{3 a^5 b^4-6 a^4 b^5 x+3 a^3 b^6 x^2}+\frac {I 24 a b^{\frac {11}{2}} x \sqrt {1-\frac {a}{b x}}}{3 a^5 b^4-6 a^4 b^5 x+3 a^3 b^6 x^2}-\frac {16 I b^{\frac {13}{2}} x^2 \sqrt {1-\frac {a}{b x}}}{3 a^5 b^4-6 a^4 b^5 x+3 a^3 b^6 x^2}\right ] \end {gather*}

Warning: Unable to verify antiderivative.

[In]

mathics('Integrate[1/(x^(3/2)*(a - b*x)^(5/2)),x]')

[Out]

Piecewise[{{Sqrt[b] (-2 a ^ 2 + 8 a b x - 16 b ^ 2 x ^ 2 / 3) Sqrt[(a - b x) / (b x)] / (a ^ 3 (a ^ 2 - 2 a b
x + b ^ 2 x ^ 2)), Abs[a / (b x)] > 1}}, -6 I a ^ 2 b ^ (9 / 2) Sqrt[1 - a / (b x)] / (3 a ^ 5 b ^ 4 - 6 a ^ 4
b ^ 5 x + 3 a ^ 3 b ^ 6 x ^ 2) + I 24 a b ^ (11 / 2) x Sqrt[1 - a / (b x)] / (3 a ^ 5 b ^ 4 - 6 a ^ 4 b ^ 5 x
+ 3 a ^ 3 b ^ 6 x ^ 2) - 16 I b ^ (13 / 2) x ^ 2 Sqrt[1 - a / (b x)] / (3 a ^ 5 b ^ 4 - 6 a ^ 4 b ^ 5 x + 3 a
^ 3 b ^ 6 x ^ 2)]

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Maple [A]
time = 0.16, size = 57, normalized size = 0.85

method	result	size
gosper	\(-\frac {2 \left (8 x^{2} b^{2}-12 a b x +3 a^{2}\right )}{3 \sqrt {x}\, \left (-b x +a \right )^{\frac {3}{2}} a^{3}}\)	\(36\)
risch	\(-\frac {2 \sqrt {-b x +a}}{a^{3} \sqrt {x}}+\frac {2 b \left (-5 b x +6 a \right ) \sqrt {x}}{3 \left (-b x +a \right )^{\frac {3}{2}} a^{3}}\)	\(43\)
default	\(-\frac {2}{a \left (-b x +a \right )^{\frac {3}{2}} \sqrt {x}}+\frac {4 b \left (\frac {2 \sqrt {x}}{3 a \left (-b x +a \right )^{\frac {3}{2}}}+\frac {4 \sqrt {x}}{3 a^{2} \sqrt {-b x +a}}\right )}{a}\)	\(57\)

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(1/x^(3/2)/(-b*x+a)^(5/2),x,method=_RETURNVERBOSE)

[Out]

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

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Maxima [A]
time = 0.26, size = 50, normalized size = 0.75 \begin {gather*} \frac {2 \, {\left (b^{2} - \frac {6 \, {\left (b x - a\right )} b}{x}\right )} x^{\frac {3}{2}}}{3 \, {\left (-b x + a\right )}^{\frac {3}{2}} a^{3}} - \frac {2 \, \sqrt {-b x + a}}{a^{3} \sqrt {x}} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(1/x^(3/2)/(-b*x+a)^(5/2),x, algorithm="maxima")

[Out]

2/3*(b^2 - 6*(b*x - a)*b/x)*x^(3/2)/((-b*x + a)^(3/2)*a^3) - 2*sqrt(-b*x + a)/(a^3*sqrt(x))

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Fricas [A]
time = 0.32, size = 59, normalized size = 0.88 \begin {gather*} -\frac {2 \, {\left (8 \, b^{2} x^{2} - 12 \, a b x + 3 \, a^{2}\right )} \sqrt {-b x + a} \sqrt {x}}{3 \, {\left (a^{3} b^{2} x^{3} - 2 \, a^{4} b x^{2} + a^{5} x\right )}} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(1/x^(3/2)/(-b*x+a)^(5/2),x, algorithm="fricas")

[Out]

-2/3*(8*b^2*x^2 - 12*a*b*x + 3*a^2)*sqrt(-b*x + a)*sqrt(x)/(a^3*b^2*x^3 - 2*a^4*b*x^2 + a^5*x)

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Sympy [C] Result contains complex when optimal does not.
time = 2.56, size = 314, normalized size = 4.69 \begin {gather*} \begin {cases} - \frac {6 a^{2} b^{\frac {9}{2}} \sqrt {\frac {a}{b x} - 1}}{3 a^{5} b^{4} - 6 a^{4} b^{5} x + 3 a^{3} b^{6} x^{2}} + \frac {24 a b^{\frac {11}{2}} x \sqrt {\frac {a}{b x} - 1}}{3 a^{5} b^{4} - 6 a^{4} b^{5} x + 3 a^{3} b^{6} x^{2}} - \frac {16 b^{\frac {13}{2}} x^{2} \sqrt {\frac {a}{b x} - 1}}{3 a^{5} b^{4} - 6 a^{4} b^{5} x + 3 a^{3} b^{6} x^{2}} & \text {for}\: \left |{\frac {a}{b x}}\right | > 1 \\- \frac {6 i a^{2} b^{\frac {9}{2}} \sqrt {- \frac {a}{b x} + 1}}{3 a^{5} b^{4} - 6 a^{4} b^{5} x + 3 a^{3} b^{6} x^{2}} + \frac {24 i a b^{\frac {11}{2}} x \sqrt {- \frac {a}{b x} + 1}}{3 a^{5} b^{4} - 6 a^{4} b^{5} x + 3 a^{3} b^{6} x^{2}} - \frac {16 i b^{\frac {13}{2}} x^{2} \sqrt {- \frac {a}{b x} + 1}}{3 a^{5} b^{4} - 6 a^{4} b^{5} x + 3 a^{3} b^{6} x^{2}} & \text {otherwise} \end {cases} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(1/x**(3/2)/(-b*x+a)**(5/2),x)

[Out]

Piecewise((-6*a**2*b**(9/2)*sqrt(a/(b*x) - 1)/(3*a**5*b**4 - 6*a**4*b**5*x + 3*a**3*b**6*x**2) + 24*a*b**(11/2
)*x*sqrt(a/(b*x) - 1)/(3*a**5*b**4 - 6*a**4*b**5*x + 3*a**3*b**6*x**2) - 16*b**(13/2)*x**2*sqrt(a/(b*x) - 1)/(
3*a**5*b**4 - 6*a**4*b**5*x + 3*a**3*b**6*x**2), Abs(a/(b*x)) > 1), (-6*I*a**2*b**(9/2)*sqrt(-a/(b*x) + 1)/(3*
a**5*b**4 - 6*a**4*b**5*x + 3*a**3*b**6*x**2) + 24*I*a*b**(11/2)*x*sqrt(-a/(b*x) + 1)/(3*a**5*b**4 - 6*a**4*b*
*5*x + 3*a**3*b**6*x**2) - 16*I*b**(13/2)*x**2*sqrt(-a/(b*x) + 1)/(3*a**5*b**4 - 6*a**4*b**5*x + 3*a**3*b**6*x
**2), True))

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Giac [A]
time = 0.01, size = 119, normalized size = 1.78 \begin {gather*} 2 \left (\frac {2 \left (-\frac {\frac {1}{18}\cdot 15 b^{3} a^{2} \sqrt {x} \sqrt {x}}{b a^{5}}+\frac {\frac {1}{18}\cdot 18 b^{2} a^{3}}{b a^{5}}\right ) \sqrt {x} \sqrt {a-b x}}{\left (a-b x\right )^{2}}+\frac {4 \sqrt {-b}}{2 a^{2} \left (\left (\sqrt {a-b x}-\sqrt {-b} \sqrt {x}\right )^{2}-a\right )}\right ) \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(1/x^(3/2)/(-b*x+a)^(5/2),x)

[Out]

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

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Mupad [B]
time = 0.44, size = 73, normalized size = 1.09 \begin {gather*} \frac {6\,a^2\,\sqrt {a-b\,x}+16\,b^2\,x^2\,\sqrt {a-b\,x}-24\,a\,b\,x\,\sqrt {a-b\,x}}{\sqrt {x}\,\left (x\,\left (6\,a^4\,b-3\,a^3\,b^2\,x\right )-3\,a^5\right )} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(1/(x^(3/2)*(a - b*x)^(5/2)),x)

[Out]

(6*a^2*(a - b*x)^(1/2) + 16*b^2*x^2*(a - b*x)^(1/2) - 24*a*b*x*(a - b*x)^(1/2))/(x^(1/2)*(x*(6*a^4*b - 3*a^3*b
^2*x) - 3*a^5))

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