Đáp án:
`4/(1xx5)+4/(5xx9)+4/(9xx13)+...+4/(2017xx2021)= 2020/2021`
Giải thích các bước giải:
` 4/(1xx5)+4/(5xx9)+4/(9xx13)+...+4/(2017xx2021)`
`= 1 - 1/5 + 1/5-1/9+1/9-1/13+...+ 1/2017+1/2021`
`= 1-1/2021`
`= 2020/2021`
Rearrange the following sentences to make meaningful dialogue. (5 pts) A. I won’t. Thanks, Dad. B. Yeah, OK, if you like. But don’t forget to do your homework. C. Hey, Tom. How is your first week at the new school? D. Ah, yeah. They are all nice to me. E. Are they friendly to you? F. Why were you nervous? G. It is great. But I was a bit nervous at first. H. The teachers are all new to me, most of my classmates are new too. I. Right, I had a good first day. And … Dad, can I join the judo club at school? I like to do judo. K Well, we had Maths, Geography and Computer studies, my favourite subject. L. Oh, good. So everything is going well at school. M. What subjects did you have today?
Câu 9: Một người bán vải lần thứ nhất bán 1/2 tấm vải và 10 m. Lần thứ hai bán 5/11 số vải còn lại và 10 m. Lần thứ 3 bán 50 m thì vừa hết. Hỏi tấm vải dài bao nhiêu mét?
Mọi Người Giúp Em Với Ạ Singapore is a country in Southeast Asia. Until 1965, Singapore was ruled by the United Kingdom. In 1965, they gained their (1)________ and established their own government. Singapore's economy is very strong in a number of different areas. (2)_______ its large and centrally located port, import and export is an important part of Singapore's economy. "Import" means bringing items into the country and "export" means sending items out of the country. Many of the goods imported and exported are electronics and technology or are related to chemical, oil, or medical supplies. Another area that is important to Singapore's economy is finance. Singapore is the world's (3)______ financial center after New York, London, and Tokyo. Over 10,000 companies from around the world have offices in Singapore. As a result of having so many multi-national companies, nearly half of the people who work in Singapore are from other countries. Singapore is (4)______ for being a clean and safe country that has many interesting sites to see. Thanks to its diverse economy, Singapore is a very wealthy nation. In fact, it is one of the top ten richest (5)______ in the world. Many people in Singapore are millionaires (6)_______ some are very poor. It is a small country, but serves as a model for other nations when looking at their own economics. 1. A. dependence B. correspondence C. free D. independence 2. A. Despite B. Due to C. Because D. In spite of 3. A. four-largest B. largest-fourth C. fourth-largest D. forth-largest 4. A. well-known B. considered C. impressed D. dangerous 5. A. nation B. continents C. countries D. provinces 6. A. so B. because C. however D. but
câu 1: tính giá trị biểu thức ( 32,5 + 28,3 x 2,7 - 108,91 ) x 2019 câu 2 : cho dãy số chẵn liên tiếp 2 , 4 ,6 ,8 ,10 ,..., 2468. Hỏi dãy số có bao nhiêu chữ số . giúp mình vớiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
Hộ mik đi ............. Câu này dễ lắm luôn
Các bạn giúp mk làm nốt các câu chưa làm và giải thích nhé
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tìm x làm họ nhe anh em Em cảm ơn ạ
Giải thích giúp mk nha đã chọn đáp án rồi
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