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D( m )
m = 0
m = 0
m = 0
m in (-oo:0) U (0:+oo)
(5/3)*m-1 = 2/m // - 2/m
(5/3)*m-(2/m)-1 = 0
(5/3)*m-2*m^-1-1 = 0
5/3*m^1-2*m^-1-1*m^0 = 0
(5/3*m^2-1*m^1-2*m^0)/(m^1) = 0 // * m^2
m^1*(5/3*m^2-1*m^1-2*m^0) = 0
m^1
(5/3)*m^2-m-2 = 0
(5/3)*m^2-m-2 = 0
DELTA = (-1)^2-(-2*4*(5/3))
DELTA = 43/3
DELTA > 0
m = ((43/3)^(1/2)+1)/(2*(5/3)) or m = (1-(43/3)^(1/2))/(2*(5/3))
m = 3/10*((43/3)^(1/2)+1) or m = 3/10*(1-(43/3)^(1/2))
m in { 3/10*(1-(43/3)^(1/2)), 3/10*((43/3)^(1/2)+1)}
m in { 3/10*(1-(43/3)^(1/2)), 3/10*((43/3)^(1/2)+1) }
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