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D( m )
m = 0
m = 0
m = 0
m in (-oo:0) U (0:+oo)
6/8 = 24/m // - 24/m
6/8-(24/m) = 0
6/8-24*m^-1 = 0
-24*m^-1 = -3/4 // : -24
m^-1 = 1/32
-1 < 0
1/(m^1) = 1/32 // * m^1
1 = 1/32*m^1 // : 1/32
32 = m^1
m = 32
m = 32
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