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D( m )
m = 0
m = 0
m = 0
m in (-oo:0) U (0:+oo)
42.78/m = 93 // - 93
42.78/m-93 = 0
42.78*m^-1 = 93 // : 42.78
m^-1 = 2.17391304
-1 < 0
1/(m^1) = 2.17391304 // * m^1
1 = 2.17391304*m^1 // : 2.17391304
0.46 = m^1
m = 0.46
m = 0.46
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