`4/(2.4) + 4/(4.6) + 4/(6.8) + ... + 4/(2008.2010)`
` = 2(2/(2.4) + 2/(4.6) + 2/(6.8) + ... + 2/(2008.2010))`
` = 2(1/2 - 1/4 + 1/4 - 1/6 + 1/6 - 1/8 + ... + 1/2008 - 1/2010)`
` = 2(1/2 - 1/2010)`
` = 2(502/1005)`
` = 1004/1005`
`4/(2×4)+4/(4×6)+4/(6×8)+...........+ 4/(2008×2010)`
`= (2/(2×4)+2/(4×6)+2/(6×8)+..........+2/(2008×2010))÷2×4`
`= (1/2-1/4+1/4-1/6+1/6-1/8+...........+1/2008-1/2010)×2`
`= (1/2-1/2010)×2`
`= 1004/2010×2`
`=1004/1005`
LÀM NHANH GIÚP MIK. KHÔNG ĐƯỢC CHÉP MẠNG ĐÚNG YÊU CẦU. MIK ĐANG CẦN GẤP !!!
Complete the following sentences with one suitable word. There may be more than one possible answer. 1. Some people spend all day doing water sports, …………………… others prefer lazing on the beach. 2. Attractive …………………… it may sound, life on an island in winter can be harsh. 3. The bus was delayed for half an hour. …………………… so, we got to our destination on time. 4. "I thought you liked Chinese food!" "On the ……………………! I can't stand ethnic cuisine." 5. All in ……………………, we would not hesitate to recommend Susan for the scholarship. 6. …………………… from a few scratches, there was no serious damage to the car. 7. As a …………………… of their new sponsorship deals, the athletes were able to train full time. 8. Mr Johnson has sometimes been unwilling to co-operate. What's ……………………, his work has not always been of a satisfactory standard.
Giúp emmmmm với ạ em cần gắp ạ😔😔😔😔
rút gọn biểu thức A= 2/1+tan^2x + 3sinx +1
Em xin lỗi vì e chỉ còn v thôi 😔😔
vẽ mầm bất ngớ đi,full màu,đẹp vào,kí đầy đủ. NL:ai bít trò teaching feeling ko chỉ tui với,tui tải chơi thử.nghe trên mạng hay lắm nên muốn test thử tí
Giúp mình với.......... .......
tìm nghiệm của pt .... gíup mk với ạ
Put the verbs into the correct form or tense. 1.They (live) ... in Ha Noi for five years. 2.My brother (enjoy) ... Maths very much. 3....She (have) English on Tuesday? 4.Where are they now?They (read) ... books in the rooms. 5.He used to (be) ... a teacher when he lived in that city.
một hình trụ cao 600mm đựng đầy Nước. Tính áp suất của nước Lên thành bình cách đáy 45cm biết trọng lượng riêng của Nước là 10000 N /m khối
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