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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
(1/2)*x-((4/3)*x)+4 = 2/x+2 // - 2/x+2
(1/2)*x-((4/3)*x)-(2/x)-2+4 = 0
(1/2)*x+(-4/3)*x-2*x^-1-2+4 = 0
2*x^0-5/6*x^1-2*x^-1 = 0
(2*x^1-5/6*x^2-2*x^0)/(x^1) = 0 // * x^2
x^1*(2*x^1-5/6*x^2-2*x^0) = 0
x^1
(-5/6)*x^2+2*x-2 = 0
(-5/6)*x^2+2*x-2 = 0
DELTA = 2^2-(-2*4*(-5/6))
DELTA = -8/3
DELTA < 0
x in { }
x belongs to the empty set
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