một lò xo nhẹ khi bị nén bởi lực F1=6N thì chiều dài là l1=44cm khi bị nén bởi lực F2=2N thì chiều dài là l2=52cm.Tính độ cứng k và chiều dài tự nhiên lo của lò xo

Giúp mình với ạ mình cần gấp. Tìm các số hữu tỉ x, y, z biết rằng: x(x+y+z) = -5; y(x+y+z) = 9; z(x+y+z) = 5

III. Give the correct form of the verbs in bracket 1. The statue (break) while it (move) to another room in the museum 2. It's the first time he (win ) the school prize 3. It's the high time you (take) care of yourself 4. They boy kept (sing ) that song. 5. I learnt English very hard so that I (have) a good job in the future 6. If the weather (not be) bad today, we (go) camping on the mountain 7. My mother 'd rather I (not/be) lazy 8. My sister always made my mother (cry) 9. I suggest that we (plan) many tres in front of our school 10. .Your report should (write) in English 11. .I learned to swim when I (be)very young. I (teach) by my father 12. Yesterday the police reported that they (capture) the thief VI. Rewrite these sentences that have the same meaning, using suggested words in the 1. I usually walk to work but today I drove. ( instead) 2. he information I got from the assistant was so confusing that I didn’t know what to do. (such) 3. Oh, sorry Jane, you are not lucky to day. (out) 4. Although the weather was bad, we went to school on time. (spite) 5. Maths is difficult for her to learn (find) 6. She hasn’t called me since I moved here (last) 7. Mr. brown feeds the chicken. He collects their eggs. (not only....... but also) 8. The man was taken to the local hospital. He was injured in the accident.(past participle) 9. The musician is internationally famous. He appeared in the concert last night.(present participle) 10. His explanation is not clear. The examples he gives are not clear. ( neither........nor)

A= 2+2^3+2^4+2^5+.......+2^2009 B=1+2^2+2^4+2^6+2^8+....+2^200 C=5+5^3+5^5+5^7+...+5^101

∩ dấu này là gì vậy mong mn giúp đỡ

Vậy đố các bạn 1254+15+1+5+8+4+5+8+85+1+5+8+4+8+3 bằng mấy

Ai giúp mình làm bài 2 trong hình với

Giải thích tại sao có sự khác nhau giữa kiểu khí hậu gió mùa và khí hậu lục địa Châu Á ?

Giải chi tiet bài này giúp mình nha

Tìm min hoặc max của biểu thức sau: $A=\frac{x^2-6x+12}{x}$