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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
(3*x-(1/x))*(3*x-(1/x)) = 0
(3*x-x^-1)*(3*x-x^-1) = 0
(3*x-x^-1)^2 = 0
3*x-x^-1 = 0
x^-1*(3*x^2-1) = 0
3*x^2 = 1 // : 3
x^2 = 1/3
x^2 = 1/3 // ^ 1/2
abs(x) = (1/3)^(1/2)
x = (1/3)^(1/2) or x = -(1/3)^(1/2)
x^-1*(x-(1/3)^(1/2))*(x+(1/3)^(1/2)) = 0
(x^-1)^2*(x-(1/3)^(1/2))^2*(x+(1/3)^(1/2))^2 = 0
( x+(1/3)^(1/2) )
x+(1/3)^(1/2) = 0 // - (1/3)^(1/2)
x = -(1/3)^(1/2)
( x-(1/3)^(1/2) )
x-(1/3)^(1/2) = 0 // + (1/3)^(1/2)
x = (1/3)^(1/2)
( x^-1 )
1*x^-1 = 0 // : 1
x^-1 = 0
x należy do O
x in { -(1/3)^(1/2), -(1/3)^(1/2), (1/3)^(1/2), (1/3)^(1/2) }
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