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phuc00kb
2 năm trước
1:cho x,y,z là ba số không âm thỏa mãn điều kiện: P=1/x^2+yz + 1/y^2+yz + 1/z^2+xy <= 1/2(1/xy+1/yz+1/zx
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EX8: Read the passage and answer these question Hi, I am Linh and this is Nam, my younger brother. I learn at Tran Phu secondary school and Nam learns at Le Loi primary school. Everyday, we get up at 5.30 and do morning exercises and play volleyball to 6.15. after that, we have breakfast at 6.30 and go to school at 6.45. I learn a lot of subjects such as English, Literature, Math, Geography, Chemistry and other subjects. English and Literature are my favorite subjects. In the afternoon, I do my homework, the housework and play table tennis with my younger brother. I often go to the school library on Thursday afternoon or on Saturday afternoon to read reference books there. Which schools do Linh and Nam learn? What do they do every morning? What subjects does Linh learn? Which subjects are Linh’s favorite ones? What does Linh do in the afternoon? When does Linh go to the school library?

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