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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
(3/2)*x-(3/x)-2 = (1/2)*x // - (1/2)*x
(3/2)*x-((1/2)*x)-(3/x)-2 = 0
(3/2)*x+(-1/2)*x-3*x^-1-2 = 0
1*x^1-3*x^-1-2*x^0 = 0
(1*x^2-2*x^1-3*x^0)/(x^1) = 0 // * x^2
x^1*(1*x^2-2*x^1-3*x^0) = 0
x^1
x^2-2*x-3 = 0
x^2-2*x-3 = 0
DELTA = (-2)^2-(-3*1*4)
DELTA = 16
DELTA > 0
x = (16^(1/2)+2)/(1*2) or x = (2-16^(1/2))/(1*2)
x = 3 or x = -1
x in { -1, 3}
x in { -1, 3 }
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