Làm báo cáo thực hành ( giúp mình với ạ )

cho A = 3 + 3 mũ 2 + 3 mũ 3 + 3 mũ 4 +.......+ 3 mũ 9 + 3 mũ 10 chứng minh a chia hết cho 4

1,|x -5| -3 = 9 2, 1<|x|< 5 3, -3 < x< 4 4, -5≤ x < 4 5, | x| - x = 0 6,| x| + x = 0 7, | x|≤2 và x< 0

Giải hệ phương trình Mọi người giải giúp em với ạ mai kt rồi ạ

Giúp em với ạ ! Bài này khó quá ! Please help me ! Câu d ạ !

định lí về tính chất hai đường thẳng song song

Chân thành cảm ơn Bài 10 phần b thôi nhé các bạn

Viết một đoạn văn ngắn 60 đến 80 chữ nêu suy nghĩ của em về việc sử dụng tiếng nước ngoài trong giao tiếp của bạn trẻ hiện nay

Hi Marco, then decide whether the questions are We are moving to our new flat on Saturday. The flat has only two bedrooms, and it has a small garden at the back. It's good for me because it's near my school and the city centre. When you come in the front door, there's a long bal with a bathroom at the other end.The door on the right KOes nto the kitchen with the dining room behind i The next room is the living room. It's a comfortable, sunny room and from there you can walk straight out into the garden. Ater that there's my parents' bedroom, and finally you come to my bedroom. It's next to the bathroom. I'm wrHing this email on my computer at my desk under the window, All my furniture is in my room now and it looks good. 71. The flat doesn't have a garden. 72. Alice walks to school. 73. The dining room is behind the kitchen. 74, Her parents' bedroom is next to the bathroom. 75. Her bedroom doesn't have a window. X. Make sentences using the words and phrases given. 76. Mai/ best friend/ school. 77. She/ love/ read/ write/ short stories. 78. We/ often/ homework/ together/ and/ she/ help/ me/ lot. 79. She/ know/ lot/ history/ and/ we/ chat/ it/ hours. 80. Tomorrow/ we/ watch/ new film/ Disney channel/ together. XI. Complete the sentences with the present simple or the present continuous form the verbs. 1. They often 2. I really 3. He can't speak on the phone because he 4. Look at that man. He 5. We sometimes 6. 1 7. We S. Right now we :I sometimes D. When their parents in the holidays. (visit) cooking. (like) a shower. (have) _a horse. (ride) to the cinema on Sunday. (go) about three DVDS a week. (watch) tennis now. (play) French. (speak) the guitar in a band. (play) her homework? (do) Susie usually German. (not understand) they chocolate ice cream? (like) . Complete each of the following sentences with ONE suitable word. us about your new school. the afternoon students do sports in the de are about our first day at school. e looks smart in his new school, Maths lessons, I bring my calculator, ruler, and you often y are going to your bicycle to school? a new school library. 5

Chung minh: a<b <=> $a^{2n+1}$ < $b^{2n+1}$ (n thuộc N)