Question

So sánh: \(2\sqrt{2}-1\) và 2

Answer 1

\(2\sqrt{2}-1=\sqrt{8}-1\\ 2=3-1\\ 3-1=\sqrt{9}-1\\ m\text{a}\sqrt{8}< \sqrt{9}=>2\sqrt{2}-1< 2\)

Answer 2

2√2−1=√8−12=3−13−1=√9−1ma√8<√9=>2√2−1<2