Question

bài 2  Tìm x không âm, biết:

a)\(\sqrt{x}\) < \(\sqrt{3}\)

b) \(\sqrt{3x}\)  < 6

c)\(\dfrac{1}{2}\)\(\sqrt{5x}\) <10

Answer 1

a) \(\sqrt{x}< \sqrt{3}\Rightarrow x< 3\Rightarrow0\le x< 3\)

b) \(\sqrt{3x}< 6\Rightarrow3x< 36\Rightarrow x< 12\Rightarrow0\le x< 12\)

c) \(\dfrac{1}{2}\sqrt{5x}< 10\Rightarrow\sqrt{5x}< 20\Rightarrow5x< 400\Rightarrow x< 80\Rightarrow0\le x< 80\)

Answer 2

a) \(0\le x< 3\)

b) \(0\le x< 12\)