3.1.39 \(\int \frac {c+d x^2}{(a+b x^2)^3} \, dx\)

Optimal. Leaf size=92 \[ \frac {(a d+3 b c) \tan ^{-1}\left (\frac {\sqrt {b} x}{\sqrt {a}}\right )}{8 a^{5/2} b^{3/2}}+\frac {x (a d+3 b c)}{8 a^2 b \left (a+b x^2\right )}+\frac {x (b c-a d)}{4 a b \left (a+b x^2\right )^2} \]

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Rubi [A]  time = 0.03, antiderivative size = 92, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 3, integrand size = 17, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.176, Rules used = {385, 199, 205} \begin {gather*} \frac {(a d+3 b c) \tan ^{-1}\left (\frac {\sqrt {b} x}{\sqrt {a}}\right )}{8 a^{5/2} b^{3/2}}+\frac {x (a d+3 b c)}{8 a^2 b \left (a+b x^2\right )}+\frac {x (b c-a d)}{4 a b \left (a+b x^2\right )^2} \end {gather*}

Antiderivative was successfully verified.

[In]

Int[(c + d*x^2)/(a + b*x^2)^3,x]

[Out]

((b*c - a*d)*x)/(4*a*b*(a + b*x^2)^2) + ((3*b*c + a*d)*x)/(8*a^2*b*(a + b*x^2)) + ((3*b*c + a*d)*ArcTan[(Sqrt[
b]*x)/Sqrt[a]])/(8*a^(5/2)*b^(3/2))

Rule 199

Int[((a_) + (b_.)*(x_)^(n_))^(p_), x_Symbol] :> -Simp[(x*(a + b*x^n)^(p + 1))/(a*n*(p + 1)), x] + Dist[(n*(p +
1) + 1)/(a*n*(p + 1)), Int[(a + b*x^n)^(p + 1), x], x] /; FreeQ[{a, b}, x] && IGtQ[n, 0] && LtQ[p, -1] && (In
tegerQ[2*p] || (n == 2 && IntegerQ[4*p]) || (n == 2 && IntegerQ[3*p]) || Denominator[p + 1/n] < Denominator[p]
)

Rule 205

Int[((a_) + (b_.)*(x_)^2)^(-1), x_Symbol] :> Simp[(Rt[a/b, 2]*ArcTan[x/Rt[a/b, 2]])/a, x] /; FreeQ[{a, b}, x]
&& PosQ[a/b]

Rule 385

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

Rubi steps

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

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Mathematica [A]  time = 0.06, size = 84, normalized size = 0.91 \begin {gather*} \frac {(a d+3 b c) \tan ^{-1}\left (\frac {\sqrt {b} x}{\sqrt {a}}\right )}{8 a^{5/2} b^{3/2}}+\frac {x \left (a^2 (-d)+a b \left (5 c+d x^2\right )+3 b^2 c x^2\right )}{8 a^2 b \left (a+b x^2\right )^2} \end {gather*}

Antiderivative was successfully verified.

[In]

Integrate[(c + d*x^2)/(a + b*x^2)^3,x]

[Out]

(x*(-(a^2*d) + 3*b^2*c*x^2 + a*b*(5*c + d*x^2)))/(8*a^2*b*(a + b*x^2)^2) + ((3*b*c + a*d)*ArcTan[(Sqrt[b]*x)/S
qrt[a]])/(8*a^(5/2)*b^(3/2))

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IntegrateAlgebraic [F]  time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \int \frac {c+d x^2}{\left (a+b x^2\right )^3} \, dx \end {gather*}

Verification is not applicable to the result.

[In]

IntegrateAlgebraic[(c + d*x^2)/(a + b*x^2)^3,x]

[Out]

IntegrateAlgebraic[(c + d*x^2)/(a + b*x^2)^3, x]

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fricas [A]  time = 0.79, size = 301, normalized size = 3.27 \begin {gather*} \left [\frac {2 \, {\left (3 \, a b^{3} c + a^{2} b^{2} d\right )} x^{3} - {\left ({\left (3 \, b^{3} c + a b^{2} d\right )} x^{4} + 3 \, a^{2} b c + a^{3} d + 2 \, {\left (3 \, a b^{2} c + a^{2} b d\right )} x^{2}\right )} \sqrt {-a b} \log \left (\frac {b x^{2} - 2 \, \sqrt {-a b} x - a}{b x^{2} + a}\right ) + 2 \, {\left (5 \, a^{2} b^{2} c - a^{3} b d\right )} x}{16 \, {\left (a^{3} b^{4} x^{4} + 2 \, a^{4} b^{3} x^{2} + a^{5} b^{2}\right )}}, \frac {{\left (3 \, a b^{3} c + a^{2} b^{2} d\right )} x^{3} + {\left ({\left (3 \, b^{3} c + a b^{2} d\right )} x^{4} + 3 \, a^{2} b c + a^{3} d + 2 \, {\left (3 \, a b^{2} c + a^{2} b d\right )} x^{2}\right )} \sqrt {a b} \arctan \left (\frac {\sqrt {a b} x}{a}\right ) + {\left (5 \, a^{2} b^{2} c - a^{3} b d\right )} x}{8 \, {\left (a^{3} b^{4} x^{4} + 2 \, a^{4} b^{3} x^{2} + a^{5} b^{2}\right )}}\right ] \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((d*x^2+c)/(b*x^2+a)^3,x, algorithm="fricas")

[Out]

[1/16*(2*(3*a*b^3*c + a^2*b^2*d)*x^3 - ((3*b^3*c + a*b^2*d)*x^4 + 3*a^2*b*c + a^3*d + 2*(3*a*b^2*c + a^2*b*d)*
x^2)*sqrt(-a*b)*log((b*x^2 - 2*sqrt(-a*b)*x - a)/(b*x^2 + a)) + 2*(5*a^2*b^2*c - a^3*b*d)*x)/(a^3*b^4*x^4 + 2*
a^4*b^3*x^2 + a^5*b^2), 1/8*((3*a*b^3*c + a^2*b^2*d)*x^3 + ((3*b^3*c + a*b^2*d)*x^4 + 3*a^2*b*c + a^3*d + 2*(3
*a*b^2*c + a^2*b*d)*x^2)*sqrt(a*b)*arctan(sqrt(a*b)*x/a) + (5*a^2*b^2*c - a^3*b*d)*x)/(a^3*b^4*x^4 + 2*a^4*b^3
*x^2 + a^5*b^2)]

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giac [A]  time = 0.58, size = 78, normalized size = 0.85 \begin {gather*} \frac {{\left (3 \, b c + a d\right )} \arctan \left (\frac {b x}{\sqrt {a b}}\right )}{8 \, \sqrt {a b} a^{2} b} + \frac {3 \, b^{2} c x^{3} + a b d x^{3} + 5 \, a b c x - a^{2} d x}{8 \, {\left (b x^{2} + a\right )}^{2} a^{2} b} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((d*x^2+c)/(b*x^2+a)^3,x, algorithm="giac")

[Out]

1/8*(3*b*c + a*d)*arctan(b*x/sqrt(a*b))/(sqrt(a*b)*a^2*b) + 1/8*(3*b^2*c*x^3 + a*b*d*x^3 + 5*a*b*c*x - a^2*d*x
)/((b*x^2 + a)^2*a^2*b)

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maple [A]  time = 0.01, size = 89, normalized size = 0.97 \begin {gather*} \frac {d \arctan \left (\frac {b x}{\sqrt {a b}}\right )}{8 \sqrt {a b}\, a b}+\frac {3 c \arctan \left (\frac {b x}{\sqrt {a b}}\right )}{8 \sqrt {a b}\, a^{2}}+\frac {\frac {\left (a d +3 b c \right ) x^{3}}{8 a^{2}}-\frac {\left (a d -5 b c \right ) x}{8 a b}}{\left (b \,x^{2}+a \right )^{2}} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int((d*x^2+c)/(b*x^2+a)^3,x)

[Out]

(1/8*(a*d+3*b*c)/a^2*x^3-1/8*(a*d-5*b*c)/a/b*x)/(b*x^2+a)^2+1/8/a/b/(a*b)^(1/2)*arctan(1/(a*b)^(1/2)*b*x)*d+3/
8/a^2/(a*b)^(1/2)*arctan(1/(a*b)^(1/2)*b*x)*c

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maxima [A]  time = 3.00, size = 92, normalized size = 1.00 \begin {gather*} \frac {{\left (3 \, b^{2} c + a b d\right )} x^{3} + {\left (5 \, a b c - a^{2} d\right )} x}{8 \, {\left (a^{2} b^{3} x^{4} + 2 \, a^{3} b^{2} x^{2} + a^{4} b\right )}} + \frac {{\left (3 \, b c + a d\right )} \arctan \left (\frac {b x}{\sqrt {a b}}\right )}{8 \, \sqrt {a b} a^{2} b} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((d*x^2+c)/(b*x^2+a)^3,x, algorithm="maxima")

[Out]

1/8*((3*b^2*c + a*b*d)*x^3 + (5*a*b*c - a^2*d)*x)/(a^2*b^3*x^4 + 2*a^3*b^2*x^2 + a^4*b) + 1/8*(3*b*c + a*d)*ar
ctan(b*x/sqrt(a*b))/(sqrt(a*b)*a^2*b)

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mupad [B]  time = 5.02, size = 81, normalized size = 0.88 \begin {gather*} \frac {\frac {x^3\,\left (a\,d+3\,b\,c\right )}{8\,a^2}-\frac {x\,\left (a\,d-5\,b\,c\right )}{8\,a\,b}}{a^2+2\,a\,b\,x^2+b^2\,x^4}+\frac {\mathrm {atan}\left (\frac {\sqrt {b}\,x}{\sqrt {a}}\right )\,\left (a\,d+3\,b\,c\right )}{8\,a^{5/2}\,b^{3/2}} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int((c + d*x^2)/(a + b*x^2)^3,x)

[Out]

((x^3*(a*d + 3*b*c))/(8*a^2) - (x*(a*d - 5*b*c))/(8*a*b))/(a^2 + b^2*x^4 + 2*a*b*x^2) + (atan((b^(1/2)*x)/a^(1
/2))*(a*d + 3*b*c))/(8*a^(5/2)*b^(3/2))

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sympy [A]  time = 0.58, size = 150, normalized size = 1.63 \begin {gather*} - \frac {\sqrt {- \frac {1}{a^{5} b^{3}}} \left (a d + 3 b c\right ) \log {\left (- a^{3} b \sqrt {- \frac {1}{a^{5} b^{3}}} + x \right )}}{16} + \frac {\sqrt {- \frac {1}{a^{5} b^{3}}} \left (a d + 3 b c\right ) \log {\left (a^{3} b \sqrt {- \frac {1}{a^{5} b^{3}}} + x \right )}}{16} + \frac {x^{3} \left (a b d + 3 b^{2} c\right ) + x \left (- a^{2} d + 5 a b c\right )}{8 a^{4} b + 16 a^{3} b^{2} x^{2} + 8 a^{2} b^{3} x^{4}} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((d*x**2+c)/(b*x**2+a)**3,x)

[Out]

-sqrt(-1/(a**5*b**3))*(a*d + 3*b*c)*log(-a**3*b*sqrt(-1/(a**5*b**3)) + x)/16 + sqrt(-1/(a**5*b**3))*(a*d + 3*b
*c)*log(a**3*b*sqrt(-1/(a**5*b**3)) + x)/16 + (x**3*(a*b*d + 3*b**2*c) + x*(-a**2*d + 5*a*b*c))/(8*a**4*b + 16
*a**3*b**2*x**2 + 8*a**2*b**3*x**4)

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