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D( n )
n = 0
n = 0
n = 0
n in (-oo:0) U (0:+oo)
3-((6/2)*n)-2/n-6 = 0
3-3*n-2/n-6 = 0
-3*n^1-2*n^-1-3*n^0 = 0
(-3*n^2-3*n^1-2*n^0)/(n^1) = 0 // * n^2
n^1*(-3*n^2-3*n^1-2*n^0) = 0
n^1
-3*n^2-3*n-2 = 0
-3*n^2-3*n-2 = 0
DELTA = (-3)^2-(-3*(-2)*4)
DELTA = -15
DELTA < 0
n in { }
n belongs to the empty set
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