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thuyduong1984
2 năm trước
Bài 1: Xét xem các phát biểu sau có phải mệnh đề không? Nếu là mệnh đề thì em hãy cho biết đó là mệnh đề đúng hay mệnh đề sai? a.2là số hữu tỉ. b. Bạn Hoa xinh quá! c. Nếu nchẵn thì nchia hết cho 2. d. Ngày mai có nắng không? e. Phương trình + − = 2 3 4 7 0 x xcó nghiệm nguyên.
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