3.62 \(\int \frac {\cot ^{-1}(a x)}{(c+d x^2)^{5/2}} \, dx\)

Optimal. Leaf size=134 \[ -\frac {\left (3 a^2 c-2 d\right ) \tanh ^{-1}\left (\frac {a \sqrt {c+d x^2}}{\sqrt {a^2 c-d}}\right )}{3 c^2 \left (a^2 c-d\right )^{3/2}}+\frac {a}{3 c \left (a^2 c-d\right ) \sqrt {c+d x^2}}+\frac {2 x \cot ^{-1}(a x)}{3 c^2 \sqrt {c+d x^2}}+\frac {x \cot ^{-1}(a x)}{3 c \left (c+d x^2\right )^{3/2}} \]

[Out]

1/3*x*arccot(a*x)/c/(d*x^2+c)^(3/2)-1/3*(3*a^2*c-2*d)*arctanh(a*(d*x^2+c)^(1/2)/(a^2*c-d)^(1/2))/c^2/(a^2*c-d)
^(3/2)+1/3*a/c/(a^2*c-d)/(d*x^2+c)^(1/2)+2/3*x*arccot(a*x)/c^2/(d*x^2+c)^(1/2)

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Rubi [A]  time = 0.33, antiderivative size = 134, normalized size of antiderivative = 1.00, number of steps used = 7, number of rules used = 9, integrand size = 16, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.562, Rules used = {192, 191, 4913, 6688, 12, 571, 78, 63, 208} \[ -\frac {\left (3 a^2 c-2 d\right ) \tanh ^{-1}\left (\frac {a \sqrt {c+d x^2}}{\sqrt {a^2 c-d}}\right )}{3 c^2 \left (a^2 c-d\right )^{3/2}}+\frac {a}{3 c \left (a^2 c-d\right ) \sqrt {c+d x^2}}+\frac {2 x \cot ^{-1}(a x)}{3 c^2 \sqrt {c+d x^2}}+\frac {x \cot ^{-1}(a x)}{3 c \left (c+d x^2\right )^{3/2}} \]

Antiderivative was successfully verified.

[In]

Int[ArcCot[a*x]/(c + d*x^2)^(5/2),x]

[Out]

a/(3*c*(a^2*c - d)*Sqrt[c + d*x^2]) + (x*ArcCot[a*x])/(3*c*(c + d*x^2)^(3/2)) + (2*x*ArcCot[a*x])/(3*c^2*Sqrt[
c + d*x^2]) - ((3*a^2*c - 2*d)*ArcTanh[(a*Sqrt[c + d*x^2])/Sqrt[a^2*c - d]])/(3*c^2*(a^2*c - d)^(3/2))

Rule 12

Int[(a_)*(u_), x_Symbol] :> Dist[a, Int[u, x], x] /; FreeQ[a, x] &&  !MatchQ[u, (b_)*(v_) /; FreeQ[b, x]]

Rule 63

Int[((a_.) + (b_.)*(x_))^(m_)*((c_.) + (d_.)*(x_))^(n_), x_Symbol] :> With[{p = Denominator[m]}, Dist[p/b, Sub
st[Int[x^(p*(m + 1) - 1)*(c - (a*d)/b + (d*x^p)/b)^n, x], x, (a + b*x)^(1/p)], x]] /; FreeQ[{a, b, c, d}, x] &
& NeQ[b*c - a*d, 0] && LtQ[-1, m, 0] && LeQ[-1, n, 0] && LeQ[Denominator[n], Denominator[m]] && IntLinearQ[a,
b, c, d, m, n, x]

Rule 78

Int[((a_.) + (b_.)*(x_))*((c_.) + (d_.)*(x_))^(n_.)*((e_.) + (f_.)*(x_))^(p_.), x_Symbol] :> -Simp[((b*e - a*f
)*(c + d*x)^(n + 1)*(e + f*x)^(p + 1))/(f*(p + 1)*(c*f - d*e)), x] - Dist[(a*d*f*(n + p + 2) - b*(d*e*(n + 1)
+ c*f*(p + 1)))/(f*(p + 1)*(c*f - d*e)), Int[(c + d*x)^n*(e + f*x)^(p + 1), x], x] /; FreeQ[{a, b, c, d, e, f,
n}, x] && LtQ[p, -1] && ( !LtQ[n, -1] || IntegerQ[p] ||  !(IntegerQ[n] ||  !(EqQ[e, 0] ||  !(EqQ[c, 0] || LtQ
[p, n]))))

Rule 191

Int[((a_) + (b_.)*(x_)^(n_))^(p_), x_Symbol] :> Simp[(x*(a + b*x^n)^(p + 1))/a, x] /; FreeQ[{a, b, n, p}, x] &
& EqQ[1/n + p + 1, 0]

Rule 192

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, n, p}, x] && ILtQ[Simplify[1/n + p + 1
], 0] && NeQ[p, -1]

Rule 208

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

Rule 571

Int[(x_)^(m_.)*((a_) + (b_.)*(x_)^(n_))^(p_.)*((c_) + (d_.)*(x_)^(n_))^(q_.)*((e_) + (f_.)*(x_)^(n_))^(r_.), x
_Symbol] :> Dist[1/n, Subst[Int[(a + b*x)^p*(c + d*x)^q*(e + f*x)^r, x], x, x^n], x] /; FreeQ[{a, b, c, d, e,
f, m, n, p, q, r}, x] && EqQ[m - n + 1, 0]

Rule 4913

Int[((a_.) + ArcCot[(c_.)*(x_)]*(b_.))*((d_.) + (e_.)*(x_)^2)^(q_.), x_Symbol] :> With[{u = IntHide[(d + e*x^2
)^q, x]}, Dist[a + b*ArcCot[c*x], u, x] + Dist[b*c, Int[u/(1 + c^2*x^2), x], x]] /; FreeQ[{a, b, c, d, e}, x]
&& (IntegerQ[q] || ILtQ[q + 1/2, 0])

Rule 6688

Int[u_, x_Symbol] :> With[{v = SimplifyIntegrand[u, x]}, Int[v, x] /; SimplerIntegrandQ[v, u, x]]

Rubi steps

\begin {align*} \int \frac {\cot ^{-1}(a x)}{\left (c+d x^2\right )^{5/2}} \, dx &=\frac {x \cot ^{-1}(a x)}{3 c \left (c+d x^2\right )^{3/2}}+\frac {2 x \cot ^{-1}(a x)}{3 c^2 \sqrt {c+d x^2}}+a \int \frac {\frac {x}{3 c \left (c+d x^2\right )^{3/2}}+\frac {2 x}{3 c^2 \sqrt {c+d x^2}}}{1+a^2 x^2} \, dx\\ &=\frac {x \cot ^{-1}(a x)}{3 c \left (c+d x^2\right )^{3/2}}+\frac {2 x \cot ^{-1}(a x)}{3 c^2 \sqrt {c+d x^2}}+a \int \frac {x \left (3 c+2 d x^2\right )}{3 c^2 \left (1+a^2 x^2\right ) \left (c+d x^2\right )^{3/2}} \, dx\\ &=\frac {x \cot ^{-1}(a x)}{3 c \left (c+d x^2\right )^{3/2}}+\frac {2 x \cot ^{-1}(a x)}{3 c^2 \sqrt {c+d x^2}}+\frac {a \int \frac {x \left (3 c+2 d x^2\right )}{\left (1+a^2 x^2\right ) \left (c+d x^2\right )^{3/2}} \, dx}{3 c^2}\\ &=\frac {x \cot ^{-1}(a x)}{3 c \left (c+d x^2\right )^{3/2}}+\frac {2 x \cot ^{-1}(a x)}{3 c^2 \sqrt {c+d x^2}}+\frac {a \operatorname {Subst}\left (\int \frac {3 c+2 d x}{\left (1+a^2 x\right ) (c+d x)^{3/2}} \, dx,x,x^2\right )}{6 c^2}\\ &=\frac {a}{3 c \left (a^2 c-d\right ) \sqrt {c+d x^2}}+\frac {x \cot ^{-1}(a x)}{3 c \left (c+d x^2\right )^{3/2}}+\frac {2 x \cot ^{-1}(a x)}{3 c^2 \sqrt {c+d x^2}}+\frac {\left (a \left (3 a^2 c-2 d\right )\right ) \operatorname {Subst}\left (\int \frac {1}{\left (1+a^2 x\right ) \sqrt {c+d x}} \, dx,x,x^2\right )}{6 c^2 \left (a^2 c-d\right )}\\ &=\frac {a}{3 c \left (a^2 c-d\right ) \sqrt {c+d x^2}}+\frac {x \cot ^{-1}(a x)}{3 c \left (c+d x^2\right )^{3/2}}+\frac {2 x \cot ^{-1}(a x)}{3 c^2 \sqrt {c+d x^2}}+\frac {\left (a \left (3 a^2 c-2 d\right )\right ) \operatorname {Subst}\left (\int \frac {1}{1-\frac {a^2 c}{d}+\frac {a^2 x^2}{d}} \, dx,x,\sqrt {c+d x^2}\right )}{3 c^2 \left (a^2 c-d\right ) d}\\ &=\frac {a}{3 c \left (a^2 c-d\right ) \sqrt {c+d x^2}}+\frac {x \cot ^{-1}(a x)}{3 c \left (c+d x^2\right )^{3/2}}+\frac {2 x \cot ^{-1}(a x)}{3 c^2 \sqrt {c+d x^2}}-\frac {\left (3 a^2 c-2 d\right ) \tanh ^{-1}\left (\frac {a \sqrt {c+d x^2}}{\sqrt {a^2 c-d}}\right )}{3 c^2 \left (a^2 c-d\right )^{3/2}}\\ \end {align*}

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Mathematica [C]  time = 0.73, size = 262, normalized size = 1.96 \[ -\frac {\frac {\left (3 a^2 c-2 d\right ) \log \left (\frac {12 a c^2 \sqrt {a^2 c-d} \left (\sqrt {a^2 c-d} \sqrt {c+d x^2}+a c-i d x\right )}{(a x+i) \left (3 a^2 c-2 d\right )}\right )}{\left (a^2 c-d\right )^{3/2}}+\frac {\left (3 a^2 c-2 d\right ) \log \left (\frac {12 a c^2 \sqrt {a^2 c-d} \left (\sqrt {a^2 c-d} \sqrt {c+d x^2}+a c+i d x\right )}{(a x-i) \left (3 a^2 c-2 d\right )}\right )}{\left (a^2 c-d\right )^{3/2}}-\frac {2 a c}{\left (a^2 c-d\right ) \sqrt {c+d x^2}}-\frac {2 x \cot ^{-1}(a x) \left (3 c+2 d x^2\right )}{\left (c+d x^2\right )^{3/2}}}{6 c^2} \]

Antiderivative was successfully verified.

[In]

Integrate[ArcCot[a*x]/(c + d*x^2)^(5/2),x]

[Out]

-1/6*((-2*a*c)/((a^2*c - d)*Sqrt[c + d*x^2]) - (2*x*(3*c + 2*d*x^2)*ArcCot[a*x])/(c + d*x^2)^(3/2) + ((3*a^2*c
- 2*d)*Log[(12*a*c^2*Sqrt[a^2*c - d]*(a*c - I*d*x + Sqrt[a^2*c - d]*Sqrt[c + d*x^2]))/((3*a^2*c - 2*d)*(I + a
*x))])/(a^2*c - d)^(3/2) + ((3*a^2*c - 2*d)*Log[(12*a*c^2*Sqrt[a^2*c - d]*(a*c + I*d*x + Sqrt[a^2*c - d]*Sqrt[
c + d*x^2]))/((3*a^2*c - 2*d)*(-I + a*x))])/(a^2*c - d)^(3/2))/c^2

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fricas [B]  time = 1.16, size = 712, normalized size = 5.31 \[ \left [\frac {{\left (3 \, a^{2} c^{3} + {\left (3 \, a^{2} c d^{2} - 2 \, d^{3}\right )} x^{4} - 2 \, c^{2} d + 2 \, {\left (3 \, a^{2} c^{2} d - 2 \, c d^{2}\right )} x^{2}\right )} \sqrt {a^{2} c - d} \log \left (\frac {a^{4} d^{2} x^{4} + 8 \, a^{4} c^{2} - 8 \, a^{2} c d + 2 \, {\left (4 \, a^{4} c d - 3 \, a^{2} d^{2}\right )} x^{2} - 4 \, {\left (a^{3} d x^{2} + 2 \, a^{3} c - a d\right )} \sqrt {a^{2} c - d} \sqrt {d x^{2} + c} + d^{2}}{a^{4} x^{4} + 2 \, a^{2} x^{2} + 1}\right ) + 4 \, {\left (a^{3} c^{3} - a c^{2} d + {\left (a^{3} c^{2} d - a c d^{2}\right )} x^{2} + {\left (2 \, {\left (a^{4} c^{2} d - 2 \, a^{2} c d^{2} + d^{3}\right )} x^{3} + 3 \, {\left (a^{4} c^{3} - 2 \, a^{2} c^{2} d + c d^{2}\right )} x\right )} \operatorname {arccot}\left (a x\right )\right )} \sqrt {d x^{2} + c}}{12 \, {\left (a^{4} c^{6} - 2 \, a^{2} c^{5} d + c^{4} d^{2} + {\left (a^{4} c^{4} d^{2} - 2 \, a^{2} c^{3} d^{3} + c^{2} d^{4}\right )} x^{4} + 2 \, {\left (a^{4} c^{5} d - 2 \, a^{2} c^{4} d^{2} + c^{3} d^{3}\right )} x^{2}\right )}}, -\frac {{\left (3 \, a^{2} c^{3} + {\left (3 \, a^{2} c d^{2} - 2 \, d^{3}\right )} x^{4} - 2 \, c^{2} d + 2 \, {\left (3 \, a^{2} c^{2} d - 2 \, c d^{2}\right )} x^{2}\right )} \sqrt {-a^{2} c + d} \arctan \left (-\frac {{\left (a^{2} d x^{2} + 2 \, a^{2} c - d\right )} \sqrt {-a^{2} c + d} \sqrt {d x^{2} + c}}{2 \, {\left (a^{3} c^{2} - a c d + {\left (a^{3} c d - a d^{2}\right )} x^{2}\right )}}\right ) - 2 \, {\left (a^{3} c^{3} - a c^{2} d + {\left (a^{3} c^{2} d - a c d^{2}\right )} x^{2} + {\left (2 \, {\left (a^{4} c^{2} d - 2 \, a^{2} c d^{2} + d^{3}\right )} x^{3} + 3 \, {\left (a^{4} c^{3} - 2 \, a^{2} c^{2} d + c d^{2}\right )} x\right )} \operatorname {arccot}\left (a x\right )\right )} \sqrt {d x^{2} + c}}{6 \, {\left (a^{4} c^{6} - 2 \, a^{2} c^{5} d + c^{4} d^{2} + {\left (a^{4} c^{4} d^{2} - 2 \, a^{2} c^{3} d^{3} + c^{2} d^{4}\right )} x^{4} + 2 \, {\left (a^{4} c^{5} d - 2 \, a^{2} c^{4} d^{2} + c^{3} d^{3}\right )} x^{2}\right )}}\right ] \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(arccot(a*x)/(d*x^2+c)^(5/2),x, algorithm="fricas")

[Out]

[1/12*((3*a^2*c^3 + (3*a^2*c*d^2 - 2*d^3)*x^4 - 2*c^2*d + 2*(3*a^2*c^2*d - 2*c*d^2)*x^2)*sqrt(a^2*c - d)*log((
a^4*d^2*x^4 + 8*a^4*c^2 - 8*a^2*c*d + 2*(4*a^4*c*d - 3*a^2*d^2)*x^2 - 4*(a^3*d*x^2 + 2*a^3*c - a*d)*sqrt(a^2*c
- d)*sqrt(d*x^2 + c) + d^2)/(a^4*x^4 + 2*a^2*x^2 + 1)) + 4*(a^3*c^3 - a*c^2*d + (a^3*c^2*d - a*c*d^2)*x^2 + (
2*(a^4*c^2*d - 2*a^2*c*d^2 + d^3)*x^3 + 3*(a^4*c^3 - 2*a^2*c^2*d + c*d^2)*x)*arccot(a*x))*sqrt(d*x^2 + c))/(a^
4*c^6 - 2*a^2*c^5*d + c^4*d^2 + (a^4*c^4*d^2 - 2*a^2*c^3*d^3 + c^2*d^4)*x^4 + 2*(a^4*c^5*d - 2*a^2*c^4*d^2 + c
^3*d^3)*x^2), -1/6*((3*a^2*c^3 + (3*a^2*c*d^2 - 2*d^3)*x^4 - 2*c^2*d + 2*(3*a^2*c^2*d - 2*c*d^2)*x^2)*sqrt(-a^
2*c + d)*arctan(-1/2*(a^2*d*x^2 + 2*a^2*c - d)*sqrt(-a^2*c + d)*sqrt(d*x^2 + c)/(a^3*c^2 - a*c*d + (a^3*c*d -
a*d^2)*x^2)) - 2*(a^3*c^3 - a*c^2*d + (a^3*c^2*d - a*c*d^2)*x^2 + (2*(a^4*c^2*d - 2*a^2*c*d^2 + d^3)*x^3 + 3*(
a^4*c^3 - 2*a^2*c^2*d + c*d^2)*x)*arccot(a*x))*sqrt(d*x^2 + c))/(a^4*c^6 - 2*a^2*c^5*d + c^4*d^2 + (a^4*c^4*d^
2 - 2*a^2*c^3*d^3 + c^2*d^4)*x^4 + 2*(a^4*c^5*d - 2*a^2*c^4*d^2 + c^3*d^3)*x^2)]

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giac [A]  time = 0.16, size = 126, normalized size = 0.94 \[ \frac {1}{3} \, a {\left (\frac {{\left (3 \, a^{2} c - 2 \, d\right )} \arctan \left (\frac {\sqrt {d x^{2} + c} a}{\sqrt {-a^{2} c + d}}\right )}{{\left (a^{2} c^{3} - c^{2} d\right )} \sqrt {-a^{2} c + d} a} + \frac {1}{{\left (a^{2} c^{2} - c d\right )} \sqrt {d x^{2} + c}}\right )} + \frac {x {\left (\frac {2 \, d x^{2}}{c^{2}} + \frac {3}{c}\right )} \arctan \left (\frac {1}{a x}\right )}{3 \, {\left (d x^{2} + c\right )}^{\frac {3}{2}}} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(arccot(a*x)/(d*x^2+c)^(5/2),x, algorithm="giac")

[Out]

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

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maple [F]  time = 1.20, size = 0, normalized size = 0.00 \[ \int \frac {\mathrm {arccot}\left (a x \right )}{\left (d \,x^{2}+c \right )^{\frac {5}{2}}}\, dx \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(arccot(a*x)/(d*x^2+c)^(5/2),x)

[Out]

int(arccot(a*x)/(d*x^2+c)^(5/2),x)

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maxima [F(-2)]  time = 0.00, size = 0, normalized size = 0.00 \[ \text {Exception raised: ValueError} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(arccot(a*x)/(d*x^2+c)^(5/2),x, algorithm="maxima")

[Out]

Exception raised: ValueError >> Computation failed since Maxima requested additional constraints; using the 'a
ssume' command before evaluation *may* help (example of legal syntax is 'assume(d-a^2*c>0)', see `assume?` for
more details)Is d-a^2*c positive or negative?

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mupad [F]  time = 0.00, size = -1, normalized size = -0.01 \[ \int \frac {\mathrm {acot}\left (a\,x\right )}{{\left (d\,x^2+c\right )}^{5/2}} \,d x \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(acot(a*x)/(c + d*x^2)^(5/2),x)

[Out]

int(acot(a*x)/(c + d*x^2)^(5/2), x)

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sympy [F]  time = 0.00, size = 0, normalized size = 0.00 \[ \int \frac {\operatorname {acot}{\left (a x \right )}}{\left (c + d x^{2}\right )^{\frac {5}{2}}}\, dx \]

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(acot(a*x)/(d*x**2+c)**(5/2),x)

[Out]

Integral(acot(a*x)/(c + d*x**2)**(5/2), x)

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