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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
(3/4)*x-(2/x) = 5 // - 5
(3/4)*x-(2/x)-5 = 0
(3/4)*x-2*x^-1-5 = 0
3/4*x^1-2*x^-1-5*x^0 = 0
(3/4*x^2-5*x^1-2*x^0)/(x^1) = 0 // * x^2
x^1*(3/4*x^2-5*x^1-2*x^0) = 0
x^1
(3/4)*x^2-5*x-2 = 0
(3/4)*x^2-5*x-2 = 0
DELTA = (-5)^2-(-2*4*(3/4))
DELTA = 31
DELTA > 0
x = (31^(1/2)+5)/(2*(3/4)) or x = (5-31^(1/2))/(2*(3/4))
x = 2/3*(31^(1/2)+5) or x = 2/3*(5-31^(1/2))
x in { 2/3*(5-31^(1/2)), 2/3*(31^(1/2)+5)}
x in { 2/3*(5-31^(1/2)), 2/3*(31^(1/2)+5) }
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