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D( y )
y = 0
y = 0
y = 0
y in (-oo:0) U (0:+oo)
5*y+2/2 = -3/y-2 // + -3/y-2
5*y-(-3/y)+2/2+2 = 0
5*y+3*y^-1+2/2+2 = 0
5*y^1+3*y^-1+3*y^0 = 0
(5*y^2+3*y^1+3*y^0)/(y^1) = 0 // * y^2
y^1*(5*y^2+3*y^1+3*y^0) = 0
y^1
5*y^2+3*y+3 = 0
5*y^2+3*y+3 = 0
DELTA = 3^2-(3*4*5)
DELTA = -51
DELTA < 0
y in { }
y belongs to the empty set
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