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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
2/x+5/2 = 4-((2/3)*x) // - 4-((2/3)*x)
(2/3)*x+2/x+5/2-4 = 0
2/3*x^1+2*x^-1-3/2*x^0 = 0
(2/3*x^2-3/2*x^1+2*x^0)/(x^1) = 0 // * x^2
x^1*(2/3*x^2-3/2*x^1+2*x^0) = 0
x^1
(2/3)*x^2+(-3/2)*x+2 = 0
(2/3)*x^2+(-3/2)*x+2 = 0
DELTA = (-3/2)^2-(2*4*(2/3))
DELTA = -37/12
DELTA < 0
x in { }
x belongs to the empty set
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