Cho x là 1 số thực bất kì, |x| là:

\(\mathbb{Z}\)

\(\mathbb{F}\)

\(\mathbb{Q}\)

\(\mathbb{R}\)

\(\sqrt {17} \) > 4,(12)

\(\sqrt {17} \) = 4,(12)

\(\sqrt {17} \) \( \le \)4,(12)

\(\sqrt {17} \) < 4,(12)

\(\sqrt {{{( - 4)}^2}} \) > \(\sqrt {17} \)

\(\sqrt {{{( - 4)}^2}} \) = \(\sqrt {17} \)

\(\sqrt {{{( - 4)}^2}} \) < \(\sqrt {17} \)

Không so sánh được

\(\sqrt {11} \)

-\(\sqrt {11} \)

11

1

\( - \dfrac{3}{4}; - \sqrt 2 - \dfrac{3}{4}; - \dfrac{1}{2};\dfrac{4}{5};0,5\)

\( - \dfrac{3}{4}; - \sqrt 2 - \dfrac{3}{4}; - \dfrac{1}{2};0,5;\dfrac{4}{5}\)

\( - \dfrac{3}{4}; - \dfrac{1}{2}; - \sqrt 2 - \dfrac{3}{4};0,5;\dfrac{4}{5}\)

\( - \sqrt 2 - \dfrac{3}{4}; - \dfrac{3}{4}; - \dfrac{1}{2};0,5;\dfrac{4}{5}\)

x = -1,75

x = 1,75

x = -1,75; x = 1,75

x = -1,75 ; x = -3,25.