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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
(4/3)*x-(2/x) = 5 // - 5
(4/3)*x-(2/x)-5 = 0
(4/3)*x-2*x^-1-5 = 0
4/3*x^1-2*x^-1-5*x^0 = 0
(4/3*x^2-5*x^1-2*x^0)/(x^1) = 0 // * x^2
x^1*(4/3*x^2-5*x^1-2*x^0) = 0
x^1
(4/3)*x^2-5*x-2 = 0
(4/3)*x^2-5*x-2 = 0
DELTA = (-5)^2-(-2*4*(4/3))
DELTA = 107/3
DELTA > 0
x = ((107/3)^(1/2)+5)/(2*(4/3)) or x = (5-(107/3)^(1/2))/(2*(4/3))
x = 3/8*((107/3)^(1/2)+5) or x = 3/8*(5-(107/3)^(1/2))
x in { 3/8*(5-(107/3)^(1/2)), 3/8*((107/3)^(1/2)+5)}
x in { 3/8*(5-(107/3)^(1/2)), 3/8*((107/3)^(1/2)+5) }
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