Chứng minh rằng: $\frac{1}{\sqrt[]{1}}$ + $\frac{1}{\sqrt[]{2}}$ + $\frac{1}{\sqrt[]{3}}$ +...+ $\frac{1}{\sqrt[]{100}}$ > 10 Giúp mik với

Các bạn ơi cứu giúp mình với mình cảm ơn nhiều

Bài 1: Theo em tại sao các tấm tôn lợp nhà lại có dạng lượn sóng mà không làm tôn phẳng? Bài 2: Một lọ thủy tinh được đậy kín bằng nút thủy tinh. Khi nút bị kẹt, theo em có thể làm như thế nào để lấy được nút ra một cách dễ dàng mà không làm hỏng đồ vật?

Em đã được tham gia trải nghiệm trong một hoạt động ngoại khoá do nhà trường vào dịp Tết nguyên đán cung các bạn gói bánh chưng. Hãy thuyết minh lại hoạt động đó

'Fill in each blank with one correct preposition' 1. Peter is proud ........................ his new bike. 2. We wear sunglasses to protect our eyes ………..the sun. 3. I hang the picture ..............the clock and the calendar. 4. Hold ..................a minute while I get my breath back. 5. He supported the plan .......................... all his heart. 6. She is very excited ............................ watching this film. 7. We are looking forward .....................seeing you again. 8. I’m sure you will succeed ..........................this entrance test. 9. She is ashamed ....................... what she has done. 10. I congratunate Susan ......................... passing the exam.

Trong quá trình thực dân Pháp xâm lược và tiến hành đánh chiếm, chúng ta đã bỏ qua mấy cơ hội đánh Pháp? Nêu cụ thể từ cơ hội đó.

Làm ơn giúp mình mình cần gấp lắm

Cho x,y,z là số thực dương thỏa mãn: xyz = x+y+z+2. Chứng minh rằng: √x + √y + √z = $\frac{3}{2}$ √xyz

VIII. Rearrange words to make full sentences. 1. to come / while you're / and stay with us / in town / would you like / ? ............................................................................................................................................................................................................. 2. Mary's / constantly picking up / dirty socks / I'm /! ............................................................................................................................................................................................................. 3. the school drum / arrived / when Lan / was sounding / at school, /. ............................................................................................................................................................................................................. 4. prison for / pay his debts / put into / failing to / he was /. ............................................................................................................................................................................................................. 5. seen from / Mount Rushmore / more than 100 kilometers away / can be /. ............................................................................................................................................................................................................. IV. Use the correct word form of the word given in each sentence. 1. I’d like to visit Australia because ____________ people are ____________ . (AUSTRALIA - FRIEND) 2. It’s not easy to find cheap ____________ at busy times. (ACCOMMODATE) 3. Most tourists like visiting ____________ villages. (TRIBE) 4. There are ____________ ways of solving the problem. (VARIETY) 5. I found the trip very ____________ . (EXCITE) 6. London is ____________ for its historic buildings and churches. (FAME) 7. You must take the injured person to the hospital ____________ . (IMMEDIATE) 8. I’d like to hear your ____________ for ways of raising money. (SUGGEST)

1. Peter is proud ........................ his new bike. 2. We wear sunglasses to protect our eyes ………..the sun. 3. I hang the picture ..............the clock and the calendar. 4. Hold ..................a minute while I get my breath back. 5. He supported the plan .......................... all his heart. 6. She is very excited ............................ watching this film. 7. We are looking forward .....................seeing you again. 8. I’m sure you will succeed ..........................this entrance test. 9. She is ashamed ....................... what she has done. 10. I congratunate Susan ......................... passing the exam.