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D( m )
m = 0
m = 0
m = 0
m in (-oo:0) U (0:+oo)
11.4/8 = 45.6/m // - 45.6/m
11.4/8-(45.6/m) = 0
11.4/8-45.6*m^-1 = 0
-45.6*m^-1 = -1.425 // : -45.6
m^-1 = 0.03125
-1 < 0
1/(m^1) = 0.03125 // * m^1
1 = 0.03125*m^1 // : 0.03125
32 = m^1
m = 32
m = 32
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