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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
2/x+2 = (4/3)*x // - (4/3)*x
2/x-((4/3)*x)+2 = 0
(-4/3)*x+2/x+2 = 0
2*x^-1-4/3*x^1+2*x^0 = 0
(2*x^1-4/3*x^2+2*x^0)/(x^1) = 0 // * x^2
x^1*(2*x^1-4/3*x^2+2*x^0) = 0
x^1
(-4/3)*x^2+2*x+2 = 0
(-4/3)*x^2+2*x+2 = 0
DELTA = 2^2-(2*4*(-4/3))
DELTA = 44/3
DELTA > 0
x = ((44/3)^(1/2)-2)/(2*(-4/3)) or x = (-(44/3)^(1/2)-2)/(2*(-4/3))
x = -3/8*((44/3)^(1/2)-2) or x = 3/8*((44/3)^(1/2)+2)
x in { -3/8*((44/3)^(1/2)-2), 3/8*((44/3)^(1/2)+2)}
x in { -3/8*((44/3)^(1/2)-2), 3/8*((44/3)^(1/2)+2) }
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