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D( x )
2*x^2-3 = 0
2*x^2-3 = 0
2*x^2-3 = 0
2*x^2 = 3 // : 2
x^2 = 3/2
x^2 = 3/2 // ^ 1/2
abs(x) = (3/2)^(1/2)
x = (3/2)^(1/2) or x = -(3/2)^(1/2)
x in (-oo:-(3/2)^(1/2)) U (-(3/2)^(1/2):(3/2)^(1/2)) U ((3/2)^(1/2):+oo)
(4*x-1)/(2*x^2-3) = 0
4*x-1 = 0 // + 1
4*x = 1 // : 4
x = 1/4
x = 1/4
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