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D( y )
y = 0
y = 0
y = 0
y in (-oo:0) U (0:+oo)
2*y+3/y = 3/2 // - 3/2
2*y+3/y-(3/2) = 0
2*y+3/y-3/2 = 0
2*y^1+3*y^-1-3/2*y^0 = 0
(2*y^2-3/2*y^1+3*y^0)/(y^1) = 0 // * y^2
y^1*(2*y^2-3/2*y^1+3*y^0) = 0
y^1
2*y^2+(-3/2)*y+3 = 0
2*y^2+(-3/2)*y+3 = 0
DELTA = (-3/2)^2-(2*3*4)
DELTA = -87/4
DELTA < 0
y in { }
y belongs to the empty set
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