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D( x )
4*x^2-6 = 0
4*x^2-6 = 0
4*x^2-6 = 0
4*x^2 = 6 // : 4
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)
(3*x)/(4*x^2-6) = 0
3*x = 0 // : 3
x = 0
x = 0
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