Cam Ngoc Tu Minh: 1

5

Tử Cam Minh Ngọc: 5GP ạ

1. onion

2. cornfield

3. breath

4. armchair

5. January, February, March, April, May, June, July, August, September, Octorber, November and December

bé hơn hoặc bằng 9 mà bạn

_{Cách 1: \(A=\left\{0;1;2;3;4;5;6;7;8;9\right\}\)}

_{Cách 2: \(A\)} = {x ∈ N | x ≤ 9}