Question

Answer 1

\(3=\sqrt{3^2}=\sqrt{9}>\sqrt{7}\Rightarrow3>\sqrt{7}\)

\(5=\sqrt{5^2}=\sqrt{25}>\sqrt{23}\Rightarrow5>\sqrt{23}\)

Answer 2

a) ta có : \(3=\sqrt{9}\) mà \(\sqrt{9}>\sqrt{7}\)

Suy ra \(3>\sqrt{7}\)

b) Ta có: \(5=\sqrt{25}\)mà \(\sqrt{23}< \sqrt{25}\)

suy ra : \(\sqrt{23}< 5\)

Answer 3

Answer 4

a/ 3 = \(\sqrt{9}\), 9 > 7 nên \(\sqrt{9}\) > \(\sqrt{7}\), vậy 3 > \(\sqrt{7}\)

b/ 5 = \(\sqrt{25}\), 23 < 25 nên \(\sqrt{23}\) < \(\sqrt{25}\), vậy \(\sqrt{23}\) < 5