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D( m )
m = 0
m-3 = 0
m^2-(3*m) = 0
m = 0
m = 0
m-3 = 0
m-3 = 0
m-3 = 0 // + 3
m = 3
m^2-(3*m) = 0
m^2-(3*m) = 0
m^2-3*m = 0
m^2-3*m = 0
DELTA = (-3)^2-(0*1*4)
DELTA = 9
DELTA > 0
m = (9^(1/2)+3)/(1*2) or m = (3-9^(1/2))/(1*2)
m = 3 or m = 0
m in (-oo:0) U (0:3) U (3:+oo)
2/(m-3)+1/m = 6/(m^2-(3*m)) // - 6/(m^2-(3*m))
2/(m-3)-(6/(m^2-(3*m)))+1/m = 0
2/(m-3)-6*(m^2-3*m)^-1+1/m = 0
2/(m-3)-6/(m^2-3*m)+1/m = 0
m^2-3*m = 0
m^2-3*m = 0
m*(m-3) = 0
m-3 = 0 // + 3
m = 3
m*(m-3) = 0
2/(m-3)-6/(m*(m-3))+1/m = 0
(2*m)/(m*(m-3))-6/(m*(m-3))+(1*(m-3))/(m*(m-3)) = 0
1*(m-3)+2*m-6 = 0
2*m+m-6-3 = 0
3*m-9 = 0
(3*m-9)/(m*(m-3)) = 0
(3*m-9)/(m*(m-3)) = 0 // * m*(m-3)
3*m-9 = 0
3*m-9 = 0 // + 9
3*m = 9 // : 3
m = 9/3
m = 3
m in { 3}
m belongs to the empty set
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