Chứng minh rằng : 1/2^2 + 1/4^2 + 1/6^2 +....+1/100^2 < 1/2 Giúp mình ạ! Cảm ơn các bạn!

Giúp mình với mình đang cần gấp cảm ơn ạ

Complete the second sentences so that it has the same meaning to the first 1. We must pay the bill at once 2.I will repair your bicycle tomorrow afternoon 3.Penicillin can cure danger diseases 4.Does your country export rice to Britain 5.Clement Clarke Moore wrote the poem in 1823

a. -5/7×2/11+ -5/7×9/11+12/7 b.-4/5×1/2+ -4/5×1/3- -4/5÷1/4 c.1/4+3/4×(-1/2+2/3 d.2/5-3/4-1/2 e.7/2- 50/100 f.8/15× -9/14+8/15× -5/14 g.-3/7+5/13+ -4/7 h.146/13 - (18/7 + 68/13

61. Traveling around the city in a day is impossible ->it's 62. Is it all right of o take a photograph?? ->Would you mind 63.''Shut the door but don't lock it ''she said to us -> She asked 64 Air travel is faster than any other kinds of transports ->Air travel is the 65. We haven't seen each other for over two years ->The last time

$\frac{x}{3}=\frac{3}{x} $x$= bao nhiêu NHANH TAY NHÂN CHÂN NÀO

A=$\frac{1+sin4x-cos4x}{1+sin4x+cos4x}$ rút gọn A

1. These materials are recycled/ reduced into other packaging products. 2. These containers are refutable/ reusable. You can use them again. 3. Try to reduce/ reuse the amount of wastes you produce. 4. Please turn the television on/ off before you go to bed. 5. Take these old newspapers to the recycling/ recycled bin. 6. If more people cycle, there will be less/ more air pollution. 7. Recycle/ Reuse old clothing by donating it to a local charity. 8. We can waste/ save a lot of trees if we recycle waste paper.

$\text { Mời bạn Thùy Linh buff điểm :3 }$

m= (5+5 mũ 2+5 mũ 3 +5 mũ 4 +...+5 mũ 29 + 5 mũ 80) ,m không phải số chính phương.Các bạn giúp mình với