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D( n )
n = 0
n = 0
n = 0
n in (-oo:0) U (0:+oo)
3/n+1/6 = (11/3)*n // - (11/3)*n
3/n-((11/3)*n)+1/6 = 0
(-11/3)*n+3/n+1/6 = 0
3*n^-1-11/3*n^1+1/6*n^0 = 0
(1/6*n^1-11/3*n^2+3*n^0)/(n^1) = 0 // * n^2
n^1*(1/6*n^1-11/3*n^2+3*n^0) = 0
n^1
(-11/3)*n^2+(1/6)*n+3 = 0
(-11/3)*n^2+(1/6)*n+3 = 0
DELTA = (1/6)^2-(3*4*(-11/3))
DELTA = 1585/36
DELTA > 0
n = ((1585/36)^(1/2)-(1/6))/(2*(-11/3)) or n = (-(1/6)-(1585/36)^(1/2))/(2*(-11/3))
n = -3/22*((1585/36)^(1/2)-1/6) or n = 3/22*((1585/36)^(1/2)+1/6)
n in { -3/22*((1585/36)^(1/2)-1/6), 3/22*((1585/36)^(1/2)+1/6)}
n in { -3/22*((1585/36)^(1/2)-1/6), 3/22*((1585/36)^(1/2)+1/6) }
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