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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
x-((3/2)*x)+1 = x+4/x // - x+4/x
x-((3/2)*x)-x-(4/x)+1 = 0
x+(-3/2)*x-x-4*x^-1+1 = 0
1*x^0-3/2*x^1-4*x^-1 = 0
(1*x^1-3/2*x^2-4*x^0)/(x^1) = 0 // * x^2
x^1*(1*x^1-3/2*x^2-4*x^0) = 0
x^1
(-3/2)*x^2+x-4 = 0
(-3/2)*x^2+x-4 = 0
DELTA = 1^2-(-4*4*(-3/2))
DELTA = -23
DELTA < 0
x in { }
x belongs to the empty set
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