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D( m )
m-2 = 0
m-2 = 0
m-2 = 0
m-2 = 0 // + 2
m = 2
m in (-oo:2) U (2:+oo)
m/(m-2)-3 = 2/(m-2) // - 2/(m-2)
m/(m-2)-(2/(m-2))-3 = 0
m/(m-2)-2*(m-2)^-1-3 = 0
m/(m-2)-2/(m-2)-3 = 0
m/(m-2)-2/(m-2)+(-3*(m-2))/(m-2) = 0
m-3*(m-2)-2 = 0
m-3*m-2+6 = 0
4-2*m = 0
(4-2*m)/(m-2) = 0
(4-2*m)/(m-2) = 0 // * m-2
4-2*m = 0
4-2*m = 0 // - 4
-2*m = -4 // : -2
m = -4/(-2)
m = 2
m in { 2}
m belongs to the empty set
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