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D( k )
k = 0
k = 0
k = 0
k in (-oo:0) U (0:+oo)
5/6 = 11*k+8/k // - 11*k+8/k
5/6-(11*k)-(8/k) = 0
5/6-11*k-8*k^-1 = 0
5/6*k^0-11*k^1-8*k^-1 = 0
(5/6*k^1-11*k^2-8*k^0)/(k^1) = 0 // * k^2
k^1*(5/6*k^1-11*k^2-8*k^0) = 0
k^1
(5/6)*k-11*k^2-8 = 0
(5/6)*k-11*k^2-8 = 0
DELTA = (5/6)^2-(-11*(-8)*4)
DELTA = -12647/36
DELTA < 0
k in { }
k belongs to the empty set
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