3.7.1 \(\int \frac {1}{x^{5/2} (a-b x)^{3/2}} \, dx\)

Optimal. Leaf size=66 \[ -\frac {16 b \sqrt {a-b x}}{3 a^3 \sqrt {x}}-\frac {8 \sqrt {a-b x}}{3 a^2 x^{3/2}}+\frac {2}{a x^{3/2} \sqrt {a-b x}} \]

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Rubi [A]  time = 0.01, antiderivative size = 66, 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 = {45, 37} \begin {gather*} -\frac {8 \sqrt {a-b x}}{3 a^2 x^{3/2}}-\frac {16 b \sqrt {a-b x}}{3 a^3 \sqrt {x}}+\frac {2}{a x^{3/2} \sqrt {a-b x}} \end {gather*}

Antiderivative was successfully verified.

[In]

Int[1/(x^(5/2)*(a - b*x)^(3/2)),x]

[Out]

2/(a*x^(3/2)*Sqrt[a - b*x]) - (8*Sqrt[a - b*x])/(3*a^2*x^(3/2)) - (16*b*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 45

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

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Mathematica [A]  time = 0.01, size = 39, normalized size = 0.59 \begin {gather*} -\frac {2 \left (a^2+4 a b x-8 b^2 x^2\right )}{3 a^3 x^{3/2} \sqrt {a-b x}} \end {gather*}

Antiderivative was successfully verified.

[In]

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

[Out]

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

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IntegrateAlgebraic [A]  time = 0.15, size = 50, normalized size = 0.76 \begin {gather*} -\frac {2 \sqrt {a-b x} \left (-a^2-4 a b x+8 b^2 x^2\right )}{3 a^3 x^{3/2} (b x-a)} \end {gather*}

Antiderivative was successfully verified.

[In]

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

[Out]

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

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fricas [A]  time = 1.20, size = 51, normalized size = 0.77 \begin {gather*} -\frac {2 \, {\left (8 \, b^{2} x^{2} - 4 \, a b x - a^{2}\right )} \sqrt {-b x + a} \sqrt {x}}{3 \, {\left (a^{3} b x^{3} - a^{4} x^{2}\right )}} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

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

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giac [B]  time = 1.48, size = 112, normalized size = 1.70 \begin {gather*} -\frac {2 \, \sqrt {-b x + a} {\left (\frac {5 \, {\left (b x - a\right )} b^{2} {\left | b \right |}}{a^{3}} + \frac {6 \, b^{2} {\left | b \right |}}{a^{2}}\right )}}{3 \, {\left ({\left (b x - a\right )} b + a b\right )}^{\frac {3}{2}}} - \frac {4 \, \sqrt {-b} b^{3}}{{\left ({\left (\sqrt {-b x + a} \sqrt {-b} - \sqrt {{\left (b x - a\right )} b + a b}\right )}^{2} - a b\right )} a^{2} {\left | b \right |}} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

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

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maple [A]  time = 0.00, size = 34, normalized size = 0.52 \begin {gather*} -\frac {2 \left (-8 b^{2} x^{2}+4 a b x +a^{2}\right )}{3 \sqrt {-b x +a}\, a^{3} x^{\frac {3}{2}}} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

-2/3*(-8*b^2*x^2+4*a*b*x+a^2)/(-b*x+a)^(1/2)/x^(3/2)/a^3

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maxima [A]  time = 1.35, size = 52, normalized size = 0.79 \begin {gather*} \frac {2 \, b^{2} \sqrt {x}}{\sqrt {-b x + a} a^{3}} - \frac {2 \, {\left (\frac {6 \, \sqrt {-b x + a} b}{\sqrt {x}} + \frac {{\left (-b x + a\right )}^{\frac {3}{2}}}{x^{\frac {3}{2}}}\right )}}{3 \, a^{3}} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

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

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mupad [B]  time = 0.43, size = 48, normalized size = 0.73 \begin {gather*} \frac {\sqrt {a-b\,x}\,\left (\frac {8\,x}{3\,a^2}+\frac {2}{3\,a\,b}-\frac {16\,b\,x^2}{3\,a^3}\right )}{x^{5/2}-\frac {a\,x^{3/2}}{b}} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(1/(x^(5/2)*(a - b*x)^(3/2)),x)

[Out]

((a - b*x)^(1/2)*((8*x)/(3*a^2) + 2/(3*a*b) - (16*b*x^2)/(3*a^3)))/(x^(5/2) - (a*x^(3/2))/b)

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sympy [B]  time = 4.64, size = 452, normalized size = 6.85 \begin {gather*} \begin {cases} \frac {2 a^{3} b^{\frac {9}{2}} \sqrt {\frac {a}{b x} - 1}}{- 3 a^{5} b^{4} x + 6 a^{4} b^{5} x^{2} - 3 a^{3} b^{6} x^{3}} + \frac {6 a^{2} b^{\frac {11}{2}} x \sqrt {\frac {a}{b x} - 1}}{- 3 a^{5} b^{4} x + 6 a^{4} b^{5} x^{2} - 3 a^{3} b^{6} x^{3}} - \frac {24 a b^{\frac {13}{2}} x^{2} \sqrt {\frac {a}{b x} - 1}}{- 3 a^{5} b^{4} x + 6 a^{4} b^{5} x^{2} - 3 a^{3} b^{6} x^{3}} + \frac {16 b^{\frac {15}{2}} x^{3} \sqrt {\frac {a}{b x} - 1}}{- 3 a^{5} b^{4} x + 6 a^{4} b^{5} x^{2} - 3 a^{3} b^{6} x^{3}} & \text {for}\: \left |{\frac {a}{b x}}\right | > 1 \\\frac {2 i a^{3} b^{\frac {9}{2}} \sqrt {- \frac {a}{b x} + 1}}{- 3 a^{5} b^{4} x + 6 a^{4} b^{5} x^{2} - 3 a^{3} b^{6} x^{3}} + \frac {6 i a^{2} b^{\frac {11}{2}} x \sqrt {- \frac {a}{b x} + 1}}{- 3 a^{5} b^{4} x + 6 a^{4} b^{5} x^{2} - 3 a^{3} b^{6} x^{3}} - \frac {24 i a b^{\frac {13}{2}} x^{2} \sqrt {- \frac {a}{b x} + 1}}{- 3 a^{5} b^{4} x + 6 a^{4} b^{5} x^{2} - 3 a^{3} b^{6} x^{3}} + \frac {16 i b^{\frac {15}{2}} x^{3} \sqrt {- \frac {a}{b x} + 1}}{- 3 a^{5} b^{4} x + 6 a^{4} b^{5} x^{2} - 3 a^{3} b^{6} x^{3}} & \text {otherwise} \end {cases} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

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

[Out]

Piecewise((2*a**3*b**(9/2)*sqrt(a/(b*x) - 1)/(-3*a**5*b**4*x + 6*a**4*b**5*x**2 - 3*a**3*b**6*x**3) + 6*a**2*b
**(11/2)*x*sqrt(a/(b*x) - 1)/(-3*a**5*b**4*x + 6*a**4*b**5*x**2 - 3*a**3*b**6*x**3) - 24*a*b**(13/2)*x**2*sqrt
(a/(b*x) - 1)/(-3*a**5*b**4*x + 6*a**4*b**5*x**2 - 3*a**3*b**6*x**3) + 16*b**(15/2)*x**3*sqrt(a/(b*x) - 1)/(-3
*a**5*b**4*x + 6*a**4*b**5*x**2 - 3*a**3*b**6*x**3), Abs(a/(b*x)) > 1), (2*I*a**3*b**(9/2)*sqrt(-a/(b*x) + 1)/
(-3*a**5*b**4*x + 6*a**4*b**5*x**2 - 3*a**3*b**6*x**3) + 6*I*a**2*b**(11/2)*x*sqrt(-a/(b*x) + 1)/(-3*a**5*b**4
*x + 6*a**4*b**5*x**2 - 3*a**3*b**6*x**3) - 24*I*a*b**(13/2)*x**2*sqrt(-a/(b*x) + 1)/(-3*a**5*b**4*x + 6*a**4*
b**5*x**2 - 3*a**3*b**6*x**3) + 16*I*b**(15/2)*x**3*sqrt(-a/(b*x) + 1)/(-3*a**5*b**4*x + 6*a**4*b**5*x**2 - 3*
a**3*b**6*x**3), True))

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