Đáp án:
2x-5/206+2x-5/207+2x-5/208=0
(2x-5)(1/206+1/207+1/208)=0
Vì (1/206+1/207+1/208) lớn hơn 0
→2x-5=0
↔2x=5
↔x=5/2
Giải thích các bước giải:
$2x$ $-$ $\frac{5}{206}$ $+$ $2x$ $-$ $\frac{5}{207}$ $+$ $2x$ $-$ $\frac{5}{208}$ $=$ $0$
$⇔$ $\text{(2x - 5)}$ $\frac{1}{206}$ $+$ $\frac{1}{207}$ $+$ $\frac{1}{208}$ $=$ $0$
$⇔$ $\text{2x - 5}$ $=$ $0$
$⇔$ $\text{2x}$ $=$ $5$
$⇔$ $x$ $=$ $\frac{5}{2}$
Vậy $x$ $=$ $\frac{5}{2}$
---------------
$@haanx2$
cần gấp ạ mong mn giải giúp xin cảm ơn trước
what should we do for the future of our planet
Em hãy cho biết tác dụng chính của việc trồng cây ven biển ? Chọn các câu trả lời chính xác: a. Chống tràn vào đồng ruộng b. Chống xói mòn lũ lụt c. Làm vành đai chắn gió d. Là lá phổi xanh điều hòa bầu khí quyển đ. Để phục vụ du lịch và tìm hiểu tự nhiên e. Để tận dụng đất ven biển g. Cung cấp nguyên liệu cho sản xuất và đời sống con người
Mấy ảnh giúp e p2 tự luận với ạ
Giúp mình với , bài nhìn dài nhưng dễ mà , mình đăng lần 2 rồi Choose the correct alternative.( chọn phương án thay thế đúng ) ADAM: Hello, Mike. What (1) are you doing / do you do in my part of London? MIKE: Well, actually, (2) I’m looking / I look at these new flats (3) they’re building / they build down the road here. ADAM: Well, (4) they’re looking / they look quite cool, but (5) I’m thinking / I think they’re quite expensive. So (6) are you wanting / do you want to move to this area? MIKE: Yes. In fact, well, the news is that Mandy and I (7) are getting / get married. ADAM: Oh, wow! Congratulations. When (8) were you deciding / did you decide? MIKE: Only last week. It was while (9) we were staying / we stayed with her family in Scotland. Now (10) we try / we’re trying to find a suitable flat. ADAM: I hope you manage to buy one of these. MIKE: Oh, (11) we aren’t looking / we don’t look for one to buy. (12) We aren’t having / We don’t have enough money yet. (13) We’re wanting / We want to rent one. ADAM: Yes, of course. That’s what Anna and I (14) did / were doing at first. Afer that, my brother (15) was lending / lent us some money. That’s how (16) we were managing / we managed to buy ours. MIKE: You’re right. We must talk to our families before (17) we choose / we’re choosing a flat. ADAM: Yeah, my family (18) gave / were giving us a lot of help and advice. Now, what about a sandwich at my place? It’s just round the corner. MIKE: Oh yes, thanks. (19) I looked / I was looking for somewhere to eat when (20) I was bumping / I bumped into you.
mn ơi làm giúp mình câu 1 với ạ . Mình cảm ơn
Giúp tôi với trà lời với aaaaaaaaaaaa
5/ Read the passage and do the exercise below : July 20th 1969 was an important day .Two Americans landed on the moon .They went in a spaceship. Its name was Apollo. On July 20th the spaceship landed in the sea of tranquility . The astronauts walked on the surface of the moon, They picked up some rocks and put them in the spaceship . Then they put a flag on the ground. On July 21st Apollo II left the moon and returned to earth . a/These sentences are True(T) or False (F): a. June 20th was an important day . ____ b. The name of the spaceship was Apollo. ____ c. The astronauts walked on the surface of the moon . ____ d. Apollo I left the moon and returned to the earth on July 21st . ____ b/ Answer the questions:) a. Did two Americans land on the moon ? ………………………………………………………………………… b. What did they pick up from the moon ?-…………………………………………………………………………. 6/ Supply the correct form of the word in parentheses 1. We should use papere as( economy) ………….. 2. She refused ( pay )……………. ……….for the meal 3. They live in ta ( mountian)………………………….area in the north-east 4. My boss let me (go )………………… ……….. home early 5. His sudden (die)……………………………..must be a shock to his family. 6. Your writing is impossible (read)……………. 7. I’ll never forget (meet)……………………….. on that day 8. There are over 50(compete)………………….. in the talent contest. 9. Nam ( nominated)……………………… as the best student in this class 10. Television is one of the cheapest forms of (entertain)………………… 11. His son’s (behave)……………………. has not improved much 12. Thousands of people were ( disaster)...............................killed in that morning . 13. Listen to those people! What language they(speak)………………….?. 14.He draws cartoons for a( humor)……………………... magazine. 15. The gas from the chemical factory is extremely(harm)………………. 16. My brother is a stamp(collect)……………………
lm giúp mk nha mk đag cần gấp mk sẽ vote 5* câu trả lời hay nhất
1.VN produces more rice than ThaiLand -> -> 2.She bought more books than he did. -> -> 3.My sister plays fewer sports than me -> -> 4.The boys plant more trees than the girls -> ->
Loga.vn - Cộng Đồng Luyện Thi Trực Tuyến
