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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
(8/3)*x-2 = 2/x-1 // - 2/x-1
(8/3)*x-(2/x)-2+1 = 0
(8/3)*x-2*x^-1-2+1 = 0
8/3*x^1-2*x^-1-1*x^0 = 0
(8/3*x^2-1*x^1-2*x^0)/(x^1) = 0 // * x^2
x^1*(8/3*x^2-1*x^1-2*x^0) = 0
x^1
(8/3)*x^2-x-2 = 0
(8/3)*x^2-x-2 = 0
DELTA = (-1)^2-(-2*4*(8/3))
DELTA = 67/3
DELTA > 0
x = ((67/3)^(1/2)+1)/(2*(8/3)) or x = (1-(67/3)^(1/2))/(2*(8/3))
x = 3/16*((67/3)^(1/2)+1) or x = 3/16*(1-(67/3)^(1/2))
x in { 3/16*(1-(67/3)^(1/2)), 3/16*((67/3)^(1/2)+1)}
x in { 3/16*(1-(67/3)^(1/2)), 3/16*((67/3)^(1/2)+1) }
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