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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
(4/3)*x-(5/6) = -2/x // + -2/x
(4/3)*x-(-2/x)-(5/6) = 0
(4/3)*x+2*x^-1-5/6 = 0
4/3*x^1+2*x^-1-5/6*x^0 = 0
(4/3*x^2-5/6*x^1+2*x^0)/(x^1) = 0 // * x^2
x^1*(4/3*x^2-5/6*x^1+2*x^0) = 0
x^1
(4/3)*x^2+(-5/6)*x+2 = 0
(4/3)*x^2+(-5/6)*x+2 = 0
DELTA = (-5/6)^2-(2*4*(4/3))
DELTA = -359/36
DELTA < 0
x in { }
x belongs to the empty set
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