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m in (-oo:+oo)
m+m/2-(2.5/4) = 0
m+m/2-0.625 = 0
3/2*m-0.625 = 0 // + 0.625
3/2*m = 0.625 // : 3/2
m = 0.625/3/2
m = 0.41666667
m = 0.41666667
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