user-avatar
tienminhsorry
2 năm trước
Chứng minh rằng $\frac{1}{1√2}$+$\frac{1}{2√3}$+$\frac{1}{3√4}$+...+ $\frac{1}{n√n+1}$>2(1-$\frac{1}{√n+1}$ )
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

1. We get up early _______ the morning. A. in B. until C. on D. next 2. We have learned English _______ 2000. A. in B. during C. for D. since 3. Peter isn’t _______ the phone, which makes it difficult to contact him. A. on B. in C. at D. by 4. Tet is a festival which occurs_______ late January or early February. A. at B. from C. on D. in 5. The match takes place_______ Saturday afternoon this week. A. of B. on C. after D. to 6. _______ Christmas, children enjoy singing Christmas carols. A. On B. At C. Since D. For 7. Lan walks past the boutique everyday_______ her way to school. A. through B. at C. on D. from 8. An anthem is a song which is sung _______ special occasions. A. of B. at C. on D. in 9. We have arranged to meet each other _______ 8:00 AM this weekend. A. to B. on C. in D. at 10. A lot of Vietnamese people who live _______ want to celebrate Tet in Viet Nam, their motherland. A. foreign B. far C. aboard D. abroad

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team