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phuongtinhoc23
2 năm trước
1) Cho phương trình ( 2m -1 ) x ² -2mx + 1 = 0 . Xác định phương trình trên có nghiệm thuộc khoảng ( -1;0 ) 2) Tìm tất cả các số tự nhiên m để phương trình x ² -m ²x +m+1=0 ( m là tham số )
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Tet is a national festival in Vietnam, every Vietnamese people love it. Tet is celebrated every year in January lunar calendar. People organize this festival to celebrate the new year. To prepare for Tet, people buy food, fruits, drink, flowers, and the most important is the peach blossom or kumquat tree. Children are bought new clothes from their parents. They can receive lucky-money from parents and relatives. On New Year's Eve, everyone in the family gathers to give each other the best wishes, eat a meal. People can go to the parks, stadiums to see fireworks, it is very beautiful. I like to stay at home to watch the New Year's comedies, it makes me laugh a lot. In the next day, people go to the temple to thank the ancestors, Buddha helped everyone in the old year. I really love Tet, I hope that Tet will always be an important festival for Vietnamese people. Nhường cho mod hoangdiepltt, chị sửa lỗi giùm em nha.

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