Daca x apartine lui Q inseamna ca:
-1 = - x/x
0 = 0/x
1 = x/x
x = x^2 / x
x^2 = x^3 / x
x ^3 = x^4 / x
x^-2 = x^-1 / x = (1/x)/x
[tex] \sqrt{ | \times | } = | { \times }^{ \frac{1}{2} } | = { \times }^{ \frac{1}{2} } [/tex]
Toate au numitorul 1 pe X atunci le putem ordona crescator:
-1 0 x^-2 radical(x) 1 x^2 x^3 x^4
