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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
3*x+14/x+2/x-5 = 0
3*x^1+16*x^-1-5*x^0 = 0
(3*x^2-5*x^1+16*x^0)/(x^1) = 0 // * x^2
x^1*(3*x^2-5*x^1+16*x^0) = 0
x^1
3*x^2-5*x+16 = 0
3*x^2-5*x+16 = 0
DELTA = (-5)^2-(3*4*16)
DELTA = -167
DELTA < 0
x in { }
x belongs to the empty set
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