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nanjazora123a
2 năm trước
1. Cho tập hợp B = {0,3,6,...,2010} Tính số phần tử của B 2. Lựa chọn phương án đúng: Cho tập hợp A = {a,b,c,d}.Số tập hợp con có hai phần tử của A là: A) 3 B) 4 C) 5 D) 6 3. Tính tổng S = 2 + 4 + 6 + 8 + ... + 98 + 100 Tổng trên bằng: 4. Lựa chọn phương án đúng: Hãy so sánh các tích sau mà không tính giá trị cụ thể của từng biểu thức A = 2000 . 2000 B = 1999 . 2001 A. A > B B. A < B C. A = B
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