Giải giúp mình với ạ. Giải theo cách tự luận nha. Mình đang cần gấp.

Cho biểu thức: M= ( $\frac{4x}{\sqrt{x}-1}$ - $\frac{\sqrt{x} -2}{x - 3\sqrt{x} +2}$ ) . $\frac{\sqrt{x}-1}{x^2}$ ( x>0, x khác 1, x khác 4) Tìm x để M<4

Mọi người giúp mình giải 2 bài này nha. Tính nhanh: ∛ ∛

A=1+2+2^2+3^3+.....+2^1982 B=7+7^2+7^3+....+7^100 C=1/2+1/2^2+1/2^3+....+1/2^100

24. “When will they answer my letter?” she asked me. ……………………………………………………………………………………………….. 25. “How many of you finished your math home work?” our math teacher asked us. ……………………………………………………………………………………………….. 26. “Whose newspapers are these?” the hotel servant asked a guest. ………………………………………………………………………………………………. 27. “Which parts of the country can people grow the wet rice plant?” a foreigner asked a Vietnamese scientist. ……………………………………………………………………………………………….. 28. “Where can we meet to discuss our assignments tomorrow?” the monitor asked her classmates. ……………………………………………………………………………………………….. 29. “With whom did you go to the concert last night?” my uncle asked me ……………………………………………………………………………………………….. 30. “How did Ba, Nam and Hoa travel to Hanoi last summer?” I said to Mai ……………………………………………………………………………………………….. 31. “How much do the front seats cost?” I said to the ticket seller. ………………………………………………………………………………………………. 32. “What size are you and your husband?” the department store keeper asked Mrs. White ………………………………………………………………………………………………. 33. “How long does it take me to get to the police station from here?” she asked a taxi driver ……………………………………………………………………………………………… 34. “How many brothers and sisters do you have?” I asked her ………………………………………………………………………………………………. 35. “What will I do if I lose my driving license?” Mr. Tan asked a policeman. ………………………………………………………………………………………………. 36. “What kind of test will I take if I want to attend this English course?” I asked a clerk. ………………………………………………………………………………………………. 37. “Which wine is better, Spanish wine or French wine?” he asked me ………………………………………………………………………………………………. 38. “How many tests have you done until now?” she asked us. ………………………………………………………………………………………………. 39. “What will you do for a living from now on?” I asked an orphan boy. ……………………………………………………………………………………………… 40. “Whom did you talk with in the school canteen three days ago?” he asked Mary. ………………………………………………………………………………………………

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28. Such characters as fairies or witches in Walt Disney animated cartoons are purely A. imaginary B. imagination C. imagine D. imaginatively 29. The Covid-19 pandemic has taken a heavy toll on the country's aviation due to international travel restrictions. A. industry B. industrialize C. industrious D. industriously 30. According to most professors, mature students are ideal students because they are hard involved in all aspects of the learning process. working and become A. active B. action C. act D. actively31. Tom is getting ever keener on doing research on A. biology 32. They are always A. support B. biological C. biologist of what their children do. B. supporting 33. It is not always easy to make a good A. decide 34. Cultural A. differences 35. Travelling to A. differ B. decision C. supportive at the last minute. C. decisive D. biologically D. supportively D. decisively can be found in such simple processes as giving or receiving a gift. B. different C. differently D. differ countries in the world enables me to learn many interesting things. B. difference C. differently D. different

Combine these sentences using relative prunouns or relative adverbs 1. Do you know the pupil ? He gaves me these tickets............. 2. She is riding on the telephant. It was carried from India... 3. The lesson wasn't easy. We did the lesson yesterday...........

Câu 11: Nồng độ phần trăm của một dung dịch cho ta biết: A.Số gam chất tan có trong 1 gam dung dịch. B. Số gam chất tan có trong 10 gam dung dịch. C. Số gam chất tan có trong 100 gam dung dịch. D. Số gam chất tan có trong 1000 gam dung dịch. Câu 12: Tính chất vật lý đầy đủ của oxi là A. Chất khí màu xanh. B. Nhẹ hơn không khí. C. Tan nhiều trong nước. D. Chất khí không màu, ít tan trong nước, nặng hơn không khí. Câu 13: Sự tác dụng của oxi với đơn chất hay hợp chất là A. sự khử. C. sự oxi hóa- khử. B. sự oxi hóa. D. phản ứng phân hủy.

Câu nói “Bậc trượng phu sinh ở đời phải cứu nạn lớn, lập công to, để tiếng thơm hàng nghìn thuở, chứ đâu lại xun xoe đi phục dịch kẻ khác” là của ai? A.Trần Hưng Đạo B.Lê Lai C.Lê Lợi D.Nguyễn Trãi