Question

[thien kim nguyen]

bài 45:so sánh

a)3\(\sqrt{3}\) và \(\sqrt{12}\)

b)7 và 3\(\sqrt{5}\)

c)\(\dfrac{1}{3}\sqrt{51}\) và \(\dfrac{1}{5}\sqrt{150}\)

d)\(\dfrac{1}{2}\sqrt{6}\)  và \(6\sqrt{\dfrac{1}{2}}\)

Answer 1

[Lấp La Lấp Lánh]

a) \(3\sqrt{3}=\sqrt{27}>\sqrt{12}\)

b) \(3\sqrt{5}=\sqrt{45}>\sqrt{27}\)

c) \(\dfrac{1}{3}\sqrt{51}=\sqrt{\dfrac{51}{9}}< \sqrt{\dfrac{54}{9}}=6=\sqrt{\dfrac{150}{25}}=\dfrac{1}{5}\sqrt{150}\)

d) \(\dfrac{1}{2}\sqrt{6}=\sqrt{\dfrac{6}{4}}=\sqrt{\dfrac{3}{2}}< \sqrt{\dfrac{36}{2}}=6\sqrt{\dfrac{1}{2}}\)