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tungdinh278
2 năm trước
a) Chứng tỏ rằng N=1/2+1/3+1/4+...+1/16+1/17 không là số tự nhiên b) So sánh: A=13^19+1/13^18+1 và B= 13^20+1/13^19+1 c) Cho p/s p=6n+5/3n+2 - Chứng minh rằng p là p/s tối giản - Với giá trị của n nào thì p lớn nhất, tìm giá trị đó d) Cho A= 5n+6/8n+7, với giá trị nào của n thì A rút gọn được? e) Tìm tất cả n ∈ N* để n+13/n-2 tối giản f) Tìm x, biết 1/5.8+1/8.11+1/11.14+...+1/x.(x.3)= 101/1540 MONG MỌI NGƯỜI GIÚP MÌNH VỚI Ạ, MAI MÌNH NỘP RỒI Ạ!
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