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D( m )
m = 0
m = 0
m = 0
m in (-oo:0) U (0:+oo)
0.273/0.123 = (2*m)/m-1 // - (2*m)/m-1
0.273/0.123-((2*m)/m)+1 = 0
0.273/0.123-2+1 = 0
1.2195122 = 0
m belongs to the empty set
m belongs to the empty set
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