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D( x )
x-2 = 0
x = 0
x-2 = 0
x-2 = 0
x-2 = 0 // + 2
x = 2
x = 0
x = 0
x in (-oo:0) U (0:2) U (2:+oo)
2/x-(2/(x-2))+2/x-1 = 0
2/x-2*(x-2)^-1+2/x-1 = 0
2/x-2/(x-2)+2/x-1 = 0
(-2*x)/(x*(x-2))+(2*(x-2))/(x*(x-2))+(2*(x-2))/(x*(x-2))+(-1*x*(x-2))/(x*(x-2)) = 0
2*(x-2)+2*(x-2)-1*x*(x-2)-2*x = 0
2*x-x^2+2*x-4-4 = 0
2*x-x^2+2*x-8 = 0
4*x-x^2-8 = 0
4*x-x^2-8 = 0
4*x-x^2-8 = 0
DELTA = 4^2-(-8*(-1)*4)
DELTA = -16
DELTA < 0
1 = 0
1/(x*(x-2)) = 0
1/(x*(x-2)) = 0 // * x*(x-2)
1 = 0
x belongs to the empty set
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