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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
11/x = (-5/3)*x+1 // - (-5/3)*x+1
11/x-((-5/3)*x)-1 = 0
(5/3)*x+11/x-1 = 0
5/3*x^1+11*x^-1-1*x^0 = 0
(5/3*x^2-1*x^1+11*x^0)/(x^1) = 0 // * x^2
x^1*(5/3*x^2-1*x^1+11*x^0) = 0
x^1
(5/3)*x^2-x+11 = 0
(5/3)*x^2-x+11 = 0
DELTA = (-1)^2-(4*11*(5/3))
DELTA = -217/3
DELTA < 0
x in { }
x belongs to the empty set
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