Tìm GTLN của S=(x^3-1)×(y^3-1) với x,y >=0 và x+y=4

khảo sát sự biến thiên và vẽ hàm số y=x2-4x

1) Fill in each gap the missing question in order to order to finish the conversation between the interviewer ( I ) and the volunteer ( V) - How long eas each class. - What did you reach them - What were the evening classes like. - Who were your students. - How about evening classes for adults. I : Well, (1)__________________________? V : The beginners. I : (2)_________________________________? V : We taught them to read and write. I : (3)___________________________________? I read it in your working plans. V : Oh, yes. We also taught adults to read and write in the evening when they wereoff work. I : (4)______________________________________? V : Not more than 2 hours. I : (5)_______________________________________? V: Oh, there was a lot of fun ! During class time we also set up some games forthe kids. 2) Use the cues to make sentences in the present perfect. 1. I / buy / a laptop / but I / not use / it. ______________________________________________________________ 2. I / write / a blog / but I / not upload / any photos to it. ___________________________________________________________________ 3. We / start / the game / half an hour ago / but we / not finish / it. _____________________________________________________________________ 4. My dad / be / to London / but he / not see / Big Ben. _______________________________________________________________ 5. I / read / my English book / but I / not do / my English homework. ____________________________________________________________________ 6. They / have / lunch / but they / not have / dinner. __________________________________________________________________ 7. I / download / some songs / but I / not listen / to them ___________________________________________________________________

jup vs ạ tksssssssssssssssssss mn

Xu hướng tất yếu của sự xuất hiện hình thái kinh tế xã hội cộng sản chủ nghĩa

Cho11 g hỗn hợp Al và Fe vào 500ml dd HCl 1m

cho hình thang ABCD có góc A=góc B=90 độ. và BC=AB=AD/2. lấy M thuộc đáy nhỏ BC,kẻ Mx vuông MA. Mx giao CD=N. chứng minh tam giác AMN vuông cân

Cho hình vẽ Ax//Cz,xAB=20°,ABC=42°,Ct là tia phân giác của BCy.Tính số đo của ZCt(bài 2)

Complete the dialogue with the correct form of the verbs in brackets. A : I went to Longman Beach last week. ( 1.you/ ever be )____________to Longman Beach ? B : Yes, I did. It's beautiful. ( 2, you/ go )____________there on the weekend ? A : Yeah, I did. I ( 3. go )____________there on Sunday. I (4. get up )__________at 5 o'clock. B : Oh ! I ( 5. never get up )____________at that time. It's so early. A : I ( 6. get )_____________to the beach early enough to see the sunrise. ( 7. you/ ever see )_________ a sunrise ? B : No, I haven't. I prefer sunsets to sunrises. A : Really ? Then I ( 8. go )____________swimming.

tong so hat proton ,notron,electron trong tu X la 28 hat ,trong do so hat khong mang dien la chiem sap si 35% tong so hat .So hat moi loai trong nguyen tu X la bao nhieu