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D( m )
m = 0
m = 0
m = 0
m in (-oo:0) U (0:+oo)
10/m-(5/6) = (3/2)*m-(5/4) // - (3/2)*m-(5/4)
10/m-((3/2)*m)-(5/6)+5/4 = 0
(-3/2)*m+10/m-5/6+5/4 = 0
10*m^-1-3/2*m^1+5/12*m^0 = 0
(5/12*m^1-3/2*m^2+10*m^0)/(m^1) = 0 // * m^2
m^1*(5/12*m^1-3/2*m^2+10*m^0) = 0
m^1
(-3/2)*m^2+(5/12)*m+10 = 0
(-3/2)*m^2+(5/12)*m+10 = 0
DELTA = (5/12)^2-(4*10*(-3/2))
DELTA = 8665/144
DELTA > 0
m = ((8665/144)^(1/2)-(5/12))/(2*(-3/2)) or m = (-(5/12)-(8665/144)^(1/2))/(2*(-3/2))
m = ((8665/144)^(1/2)-5/12)/(-3) or m = ((8665/144)^(1/2)+5/12)/3
m in { ((8665/144)^(1/2)-5/12)/(-3), ((8665/144)^(1/2)+5/12)/3}
m in { ((8665/144)^(1/2)-5/12)/(-3), ((8665/144)^(1/2)+5/12)/3 }
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