3.32 \(\int \frac{a+b \text{sech}^{-1}(c x)}{x^7} \, dx\)

Optimal. Leaf size=158 \[ -\frac{a+b \text{sech}^{-1}(c x)}{6 x^6}+\frac{5 b c^4 \sqrt{1-c x}}{96 x^2 \sqrt{\frac{1}{c x+1}}}+\frac{5 b c^2 \sqrt{1-c x}}{144 x^4 \sqrt{\frac{1}{c x+1}}}+\frac{5}{96} b c^6 \sqrt{\frac{1}{c x+1}} \sqrt{c x+1} \tanh ^{-1}\left (\sqrt{1-c x} \sqrt{c x+1}\right )+\frac{b \sqrt{1-c x}}{36 x^6 \sqrt{\frac{1}{c x+1}}} \]

[Out]

(b*Sqrt[1 - c*x])/(36*x^6*Sqrt[(1 + c*x)^(-1)]) + (5*b*c^2*Sqrt[1 - c*x])/(144*x^4*Sqrt[(1 + c*x)^(-1)]) + (5*
b*c^4*Sqrt[1 - c*x])/(96*x^2*Sqrt[(1 + c*x)^(-1)]) - (a + b*ArcSech[c*x])/(6*x^6) + (5*b*c^6*Sqrt[(1 + c*x)^(-
1)]*Sqrt[1 + c*x]*ArcTanh[Sqrt[1 - c*x]*Sqrt[1 + c*x]])/96

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Rubi [A]  time = 0.0728699, antiderivative size = 158, normalized size of antiderivative = 1., number of steps used = 9, number of rules used = 5, integrand size = 12, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.417, Rules used = {6283, 103, 12, 92, 208} \[ -\frac{a+b \text{sech}^{-1}(c x)}{6 x^6}+\frac{5 b c^4 \sqrt{1-c x}}{96 x^2 \sqrt{\frac{1}{c x+1}}}+\frac{5 b c^2 \sqrt{1-c x}}{144 x^4 \sqrt{\frac{1}{c x+1}}}+\frac{5}{96} b c^6 \sqrt{\frac{1}{c x+1}} \sqrt{c x+1} \tanh ^{-1}\left (\sqrt{1-c x} \sqrt{c x+1}\right )+\frac{b \sqrt{1-c x}}{36 x^6 \sqrt{\frac{1}{c x+1}}} \]

Antiderivative was successfully verified.

[In]

Int[(a + b*ArcSech[c*x])/x^7,x]

[Out]

(b*Sqrt[1 - c*x])/(36*x^6*Sqrt[(1 + c*x)^(-1)]) + (5*b*c^2*Sqrt[1 - c*x])/(144*x^4*Sqrt[(1 + c*x)^(-1)]) + (5*
b*c^4*Sqrt[1 - c*x])/(96*x^2*Sqrt[(1 + c*x)^(-1)]) - (a + b*ArcSech[c*x])/(6*x^6) + (5*b*c^6*Sqrt[(1 + c*x)^(-
1)]*Sqrt[1 + c*x]*ArcTanh[Sqrt[1 - c*x]*Sqrt[1 + c*x]])/96

Rule 6283

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

Rule 103

Int[((a_.) + (b_.)*(x_))^(m_)*((c_.) + (d_.)*(x_))^(n_.)*((e_.) + (f_.)*(x_))^(p_.), x_Symbol] :> Simp[(b*(a +
b*x)^(m + 1)*(c + d*x)^(n + 1)*(e + f*x)^(p + 1))/((m + 1)*(b*c - a*d)*(b*e - a*f)), x] + Dist[1/((m + 1)*(b*
c - a*d)*(b*e - a*f)), Int[(a + b*x)^(m + 1)*(c + d*x)^n*(e + f*x)^p*Simp[a*d*f*(m + 1) - b*(d*e*(m + n + 2) +
c*f*(m + p + 2)) - b*d*f*(m + n + p + 3)*x, x], x], x] /; FreeQ[{a, b, c, d, e, f, n, p}, x] && LtQ[m, -1] &&
IntegerQ[m] && (IntegerQ[n] || IntegersQ[2*n, 2*p])

Rule 12

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

Rule 92

Int[1/(Sqrt[(a_.) + (b_.)*(x_)]*Sqrt[(c_.) + (d_.)*(x_)]*((e_.) + (f_.)*(x_))), x_Symbol] :> Dist[b*f, Subst[I
nt[1/(d*(b*e - a*f)^2 + b*f^2*x^2), x], x, Sqrt[a + b*x]*Sqrt[c + d*x]], x] /; FreeQ[{a, b, c, d, e, f}, x] &&
EqQ[2*b*d*e - f*(b*c + a*d), 0]

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]

Rubi steps

\begin{align*} \int \frac{a+b \text{sech}^{-1}(c x)}{x^7} \, dx &=-\frac{a+b \text{sech}^{-1}(c x)}{6 x^6}-\frac{1}{6} \left (b \sqrt{\frac{1}{1+c x}} \sqrt{1+c x}\right ) \int \frac{1}{x^7 \sqrt{1-c x} \sqrt{1+c x}} \, dx\\ &=\frac{b \sqrt{1-c x}}{36 x^6 \sqrt{\frac{1}{1+c x}}}-\frac{a+b \text{sech}^{-1}(c x)}{6 x^6}+\frac{1}{36} \left (b \sqrt{\frac{1}{1+c x}} \sqrt{1+c x}\right ) \int -\frac{5 c^2}{x^5 \sqrt{1-c x} \sqrt{1+c x}} \, dx\\ &=\frac{b \sqrt{1-c x}}{36 x^6 \sqrt{\frac{1}{1+c x}}}-\frac{a+b \text{sech}^{-1}(c x)}{6 x^6}-\frac{1}{36} \left (5 b c^2 \sqrt{\frac{1}{1+c x}} \sqrt{1+c x}\right ) \int \frac{1}{x^5 \sqrt{1-c x} \sqrt{1+c x}} \, dx\\ &=\frac{b \sqrt{1-c x}}{36 x^6 \sqrt{\frac{1}{1+c x}}}+\frac{5 b c^2 \sqrt{1-c x}}{144 x^4 \sqrt{\frac{1}{1+c x}}}-\frac{a+b \text{sech}^{-1}(c x)}{6 x^6}+\frac{1}{144} \left (5 b c^2 \sqrt{\frac{1}{1+c x}} \sqrt{1+c x}\right ) \int -\frac{3 c^2}{x^3 \sqrt{1-c x} \sqrt{1+c x}} \, dx\\ &=\frac{b \sqrt{1-c x}}{36 x^6 \sqrt{\frac{1}{1+c x}}}+\frac{5 b c^2 \sqrt{1-c x}}{144 x^4 \sqrt{\frac{1}{1+c x}}}-\frac{a+b \text{sech}^{-1}(c x)}{6 x^6}-\frac{1}{48} \left (5 b c^4 \sqrt{\frac{1}{1+c x}} \sqrt{1+c x}\right ) \int \frac{1}{x^3 \sqrt{1-c x} \sqrt{1+c x}} \, dx\\ &=\frac{b \sqrt{1-c x}}{36 x^6 \sqrt{\frac{1}{1+c x}}}+\frac{5 b c^2 \sqrt{1-c x}}{144 x^4 \sqrt{\frac{1}{1+c x}}}+\frac{5 b c^4 \sqrt{1-c x}}{96 x^2 \sqrt{\frac{1}{1+c x}}}-\frac{a+b \text{sech}^{-1}(c x)}{6 x^6}-\frac{1}{96} \left (5 b c^4 \sqrt{\frac{1}{1+c x}} \sqrt{1+c x}\right ) \int \frac{c^2}{x \sqrt{1-c x} \sqrt{1+c x}} \, dx\\ &=\frac{b \sqrt{1-c x}}{36 x^6 \sqrt{\frac{1}{1+c x}}}+\frac{5 b c^2 \sqrt{1-c x}}{144 x^4 \sqrt{\frac{1}{1+c x}}}+\frac{5 b c^4 \sqrt{1-c x}}{96 x^2 \sqrt{\frac{1}{1+c x}}}-\frac{a+b \text{sech}^{-1}(c x)}{6 x^6}-\frac{1}{96} \left (5 b c^6 \sqrt{\frac{1}{1+c x}} \sqrt{1+c x}\right ) \int \frac{1}{x \sqrt{1-c x} \sqrt{1+c x}} \, dx\\ &=\frac{b \sqrt{1-c x}}{36 x^6 \sqrt{\frac{1}{1+c x}}}+\frac{5 b c^2 \sqrt{1-c x}}{144 x^4 \sqrt{\frac{1}{1+c x}}}+\frac{5 b c^4 \sqrt{1-c x}}{96 x^2 \sqrt{\frac{1}{1+c x}}}-\frac{a+b \text{sech}^{-1}(c x)}{6 x^6}+\frac{1}{96} \left (5 b c^7 \sqrt{\frac{1}{1+c x}} \sqrt{1+c x}\right ) \operatorname{Subst}\left (\int \frac{1}{c-c x^2} \, dx,x,\sqrt{1-c x} \sqrt{1+c x}\right )\\ &=\frac{b \sqrt{1-c x}}{36 x^6 \sqrt{\frac{1}{1+c x}}}+\frac{5 b c^2 \sqrt{1-c x}}{144 x^4 \sqrt{\frac{1}{1+c x}}}+\frac{5 b c^4 \sqrt{1-c x}}{96 x^2 \sqrt{\frac{1}{1+c x}}}-\frac{a+b \text{sech}^{-1}(c x)}{6 x^6}+\frac{5}{96} b c^6 \sqrt{\frac{1}{1+c x}} \sqrt{1+c x} \tanh ^{-1}\left (\sqrt{1-c x} \sqrt{1+c x}\right )\\ \end{align*}

Mathematica [A]  time = 0.142301, size = 157, normalized size = 0.99 \[ -\frac{a}{6 x^6}+b \left (\frac{5 c^4}{96 x^2}+\frac{5 c^3}{144 x^3}+\frac{5 c^2}{144 x^4}+\frac{5 c^5}{96 x}+\frac{c}{36 x^5}+\frac{1}{36 x^6}\right ) \sqrt{\frac{1-c x}{c x+1}}-\frac{5}{96} b c^6 \log (x)+\frac{5}{96} b c^6 \log \left (c x \sqrt{\frac{1-c x}{c x+1}}+\sqrt{\frac{1-c x}{c x+1}}+1\right )-\frac{b \text{sech}^{-1}(c x)}{6 x^6} \]

Antiderivative was successfully verified.

[In]

Integrate[(a + b*ArcSech[c*x])/x^7,x]

[Out]

-a/(6*x^6) + b*(1/(36*x^6) + c/(36*x^5) + (5*c^2)/(144*x^4) + (5*c^3)/(144*x^3) + (5*c^4)/(96*x^2) + (5*c^5)/(
96*x))*Sqrt[(1 - c*x)/(1 + c*x)] - (b*ArcSech[c*x])/(6*x^6) - (5*b*c^6*Log[x])/96 + (5*b*c^6*Log[1 + Sqrt[(1 -
c*x)/(1 + c*x)] + c*x*Sqrt[(1 - c*x)/(1 + c*x)]])/96

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Maple [A]  time = 0.189, size = 155, normalized size = 1. \begin{align*}{c}^{6} \left ( -{\frac{a}{6\,{c}^{6}{x}^{6}}}+b \left ( -{\frac{{\rm arcsech} \left (cx\right )}{6\,{c}^{6}{x}^{6}}}+{\frac{1}{288\,{c}^{5}{x}^{5}}\sqrt{-{\frac{cx-1}{cx}}}\sqrt{{\frac{cx+1}{cx}}} \left ( 15\,{\it Artanh} \left ({\frac{1}{\sqrt{-{c}^{2}{x}^{2}+1}}} \right ){c}^{6}{x}^{6}+15\,{c}^{4}{x}^{4}\sqrt{-{c}^{2}{x}^{2}+1}+10\,\sqrt{-{c}^{2}{x}^{2}+1}{c}^{2}{x}^{2}+8\,\sqrt{-{c}^{2}{x}^{2}+1} \right ){\frac{1}{\sqrt{-{c}^{2}{x}^{2}+1}}}} \right ) \right ) \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int((a+b*arcsech(c*x))/x^7,x)

[Out]

c^6*(-1/6*a/c^6/x^6+b*(-1/6/c^6/x^6*arcsech(c*x)+1/288*(-(c*x-1)/c/x)^(1/2)/c^5/x^5*((c*x+1)/c/x)^(1/2)*(15*ar
ctanh(1/(-c^2*x^2+1)^(1/2))*c^6*x^6+15*c^4*x^4*(-c^2*x^2+1)^(1/2)+10*(-c^2*x^2+1)^(1/2)*c^2*x^2+8*(-c^2*x^2+1)
^(1/2))/(-c^2*x^2+1)^(1/2)))

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Maxima [A]  time = 1.01455, size = 250, normalized size = 1.58 \begin{align*} \frac{1}{576} \, b{\left (\frac{15 \, c^{7} \log \left (c x \sqrt{\frac{1}{c^{2} x^{2}} - 1} + 1\right ) - 15 \, c^{7} \log \left (c x \sqrt{\frac{1}{c^{2} x^{2}} - 1} - 1\right ) - \frac{2 \,{\left (15 \, c^{12} x^{5}{\left (\frac{1}{c^{2} x^{2}} - 1\right )}^{\frac{5}{2}} - 40 \, c^{10} x^{3}{\left (\frac{1}{c^{2} x^{2}} - 1\right )}^{\frac{3}{2}} + 33 \, c^{8} x \sqrt{\frac{1}{c^{2} x^{2}} - 1}\right )}}{c^{6} x^{6}{\left (\frac{1}{c^{2} x^{2}} - 1\right )}^{3} - 3 \, c^{4} x^{4}{\left (\frac{1}{c^{2} x^{2}} - 1\right )}^{2} + 3 \, c^{2} x^{2}{\left (\frac{1}{c^{2} x^{2}} - 1\right )} - 1}}{c} - \frac{96 \, \operatorname{arsech}\left (c x\right )}{x^{6}}\right )} - \frac{a}{6 \, x^{6}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((a+b*arcsech(c*x))/x^7,x, algorithm="maxima")

[Out]

1/576*b*((15*c^7*log(c*x*sqrt(1/(c^2*x^2) - 1) + 1) - 15*c^7*log(c*x*sqrt(1/(c^2*x^2) - 1) - 1) - 2*(15*c^12*x
^5*(1/(c^2*x^2) - 1)^(5/2) - 40*c^10*x^3*(1/(c^2*x^2) - 1)^(3/2) + 33*c^8*x*sqrt(1/(c^2*x^2) - 1))/(c^6*x^6*(1
/(c^2*x^2) - 1)^3 - 3*c^4*x^4*(1/(c^2*x^2) - 1)^2 + 3*c^2*x^2*(1/(c^2*x^2) - 1) - 1))/c - 96*arcsech(c*x)/x^6)
- 1/6*a/x^6

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Fricas [A]  time = 1.83268, size = 227, normalized size = 1.44 \begin{align*} \frac{3 \,{\left (5 \, b c^{6} x^{6} - 16 \, b\right )} \log \left (\frac{c x \sqrt{-\frac{c^{2} x^{2} - 1}{c^{2} x^{2}}} + 1}{c x}\right ) +{\left (15 \, b c^{5} x^{5} + 10 \, b c^{3} x^{3} + 8 \, b c x\right )} \sqrt{-\frac{c^{2} x^{2} - 1}{c^{2} x^{2}}} - 48 \, a}{288 \, x^{6}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((a+b*arcsech(c*x))/x^7,x, algorithm="fricas")

[Out]

1/288*(3*(5*b*c^6*x^6 - 16*b)*log((c*x*sqrt(-(c^2*x^2 - 1)/(c^2*x^2)) + 1)/(c*x)) + (15*b*c^5*x^5 + 10*b*c^3*x
^3 + 8*b*c*x)*sqrt(-(c^2*x^2 - 1)/(c^2*x^2)) - 48*a)/x^6

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Sympy [F]  time = 0., size = 0, normalized size = 0. \begin{align*} \int \frac{a + b \operatorname{asech}{\left (c x \right )}}{x^{7}}\, dx \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((a+b*asech(c*x))/x**7,x)

[Out]

Integral((a + b*asech(c*x))/x**7, x)

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Giac [F]  time = 0., size = 0, normalized size = 0. \begin{align*} \int \frac{b \operatorname{arsech}\left (c x\right ) + a}{x^{7}}\,{d x} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((a+b*arcsech(c*x))/x^7,x, algorithm="giac")

[Out]

integrate((b*arcsech(c*x) + a)/x^7, x)