BT5. Mọi người giúp em với ạ a) Sử dụng con lắc đơn dài 0,35 m thực hiện 10 dao động tự do trong 10 s. Hãy xác định gia tốc trọng trường tại khu vực thí nghiệm. b) Con lắc lò xo sử dụng vật nặng 0,40 kg thì đo được 10 dao động trong 1 s. Hãy xác định độ cứng của lò xo.

Mọi người chỉ em với . Hôm nay e làm kiểm tra mà bài khó quá 🥲

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Vẽ avata tròn Yêu cầu: Nữ 1 tấm lạnh 1 tấm cute (anime) trên đầu có chữ truclan . Một tấm kí một tấm ko

$x^{2}$ -2x - $m^{2}$ + 1 Tìm x theo m

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Giúp e với ạ B Circle the correct answers. 1 You have to be prepared to work hard if you want to achieve / accomplish your goals. 2 The office is equipped with cutting edge data / digital technology. 3 Paula insisted / persisted that I accept her proposal. She just wouldn’t take no for an answer. 4 Our firm is proud that we never distinguish / discriminate among our employees based on gender or race. 5 He is a very industrial / industrious young man – always the first to arrive and the last to leave the office. 6 I need your help in solving / resolving some problems I’m having with this project. 7 Samantha got into medical school and is well on her way to understanding / realising her dream of becoming a doctor. 8 I chose this profession because I love it, even though I always knew I would never accrue great riches / richness from it. 9 Just because the last business you tried to set up was a defeat / failure, it doesn’t mean you shouldn’t try again. 10 New technologies are bringing about a(n) revolution / evolution in the way we teach

D Complete the sentences using the correct form of the verbs in brackets. 1 I ___________ (think) about looking for a new job for some time now. 2 The professor claimed that the student ___________ (cheat) on his exams all along. 3 Where were you when I ___________ (work) all day to finish the project before the deadline? 4 I ___________ (not come) into the office tomorrow; I’ve taken the day off. 5 The weather seems to be getting worse. ___________ (you / bring) an umbrella with you? 6 You ___________ (look) really tired. Why don’t you go home and get some rest? 7 Sarah ___________ (cook) for her guests all day, and in the end, she was too tired to enjoy her own party! 8 By the time he turned thirty, Steve ___________ (already / make) his first million. 9 My mum ___________ (teach) me to play the piano when I was a kid. 10 He is such a self-centred man that he believes the whole world ___________ (revolve) around him. 11 Sorry I didn’t have time to return your call. I ___________ (type up) reports all morning. 12 ___________ (you / decide) when you want to take your holiday this year, yet?

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Phân tích đa thức thành nhân tử a. x²(1-x²) - 4 - 4x² b. x² + y² + xy - x - y c. (1+2x)(1-2x) - x(x-2)(x-2) d. x⁴ + 2x³ + 2x² + 2x + 1