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D( x )
x-2 = 0
x-3 = 0
x-2 = 0
x-2 = 0
x-2 = 0 // + 2
x = 2
x-3 = 0
x-3 = 0
x-3 = 0 // + 3
x = 3
x in (-oo:2) U (2:3) U (3:+oo)
(x-1)/(x-3)-(3/(x-2)) = 0
(x-1)/(x-3)-3*(x-2)^-1 = 0
(x-1)/(x-3)-3/(x-2) = 0
((x-1)*(x-2))/((x-3)*(x-2))+(-3*(x-3))/((x-3)*(x-2)) = 0
(x-1)*(x-2)-3*(x-3) = 0
x^2-6*x+11 = 0
x^2-6*x+11 = 0
x^2-6*x+11 = 0
DELTA = (-6)^2-(1*4*11)
DELTA = -8
DELTA < 0
1 = 0
1/((x-3)*(x-2)) = 0
1/((x-3)*(x-2)) = 0 // * (x-3)*(x-2)
1 = 0
x belongs to the empty set
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