Xác định a, b để hàm số y = a(x + 1)2 + b(x + 2)2
là hàm số bậc nhất?

tính các góc của hình thoi, biết 2 đường chéo của hình có độ dài  $2\sqrt{3}$ và 2 

VI. Choose the word or phrase among A, B, C or D that best fits the blanks space in the following passage. The country and the city have advantages and (1). the country live in more beautiful surroundings. They enjoy (2). quietness, and can do their work at their (3) in a (4)_ neighbors are more friendly, and ready to help them (5). it. Their life, however, can be (6) People in and pace because no one is _- They live in larger, more comfortable houses, and their they need and they may be isolated, which is they are ill or want to take children to school. serious problem (7) The city has all the services that the country lacks, but it (8) has a lot of disadvantages. Cities are often polluted. They not (9) have polluted air but also have noisy streets. Everyone is always in hurry and this (10) that people have no time to get to know each other and make friends. 1. A. joy B. enjoyment C. happiness D. disadvantages 2. A. quiet B. quietly С. реасе D. peaceful 3. A. less B. own C. just D. only A. hurry C. hurriedly D. hurrying 4. B. hurried 5. A. when B. which C. what D. that 6. A. bore B. bored C. boring D. bores 7 A. unless B. because C. although D. if 8. A. also В. уet C. already D. so 9. A. never B. ever C. hardly D. only 10. А. aims B. means C. asks D. Said

(x-3).(x+3)-(x+1)^2

Xét tính đúng sai và viết mệnh đề phủ định 

∃ x thuộc R, x^2<x

vẽ đồ thị: $y= x^4-4x^2+2$

Cho ABCD hình vuông có AC cắt BD tại O, lấy M trên cạnh ADSao cho AM < 

MD . Vẽ MP // BD (Điểm B thuộc AB) vẽ MQ vuông BC .Chứng Minh 

a) BDMP hình thang cân 

b) CDMQ hình chữ nhật 

c)Tam giác POQ vuông cân 

17.  I’m sorry but we have decided not to accept your application. regret

I.......................................................................................... we have decided to reject your application.

18.  Funnily enough I’d prefer a pizza for a change. rather

Funnily enough........................................................................................................................................................

19.  We were not allowed to drink too much Coke when we were children. let

Our parents........................................................................................................................................................

20.  I think it would be a good idea to take the train. suggest

I...................................................................................................................................................................

21.  She succeeded in persuading her parents to let her go. managed

She..............................................................................................................................................................

22.  It looks as if this door’s locked after all. appears

This ....................................................................................................................................................................

23.  One of the things I hate is people eating popcorn in the cinema. stand

One of the things I...................................................................................................................................................................

24.  The singer arrived two hours late but I’m glad I waited for him. worth

The singer..........................................................................................................................................................

25.  Jack said he had to catch the early flight. insisted

Jack............................................................................................................................................................

26.  I can’t wait to get your next letter. forward

I................................................................................................................................................................

giúp mk với nhé,đang cần gấp lắm ạ

Cần gấp trong gôm nay

9 The instruction ....come with machine are impossible to follow. 10 The man to ....I was meeting was an important client. 11 The problem about...we had so much dicussion has been solved. 12 A car manufactor ,...name I have forgotten ,has invented an electric car. 13 The report ,...was drawn up by a special commitee ,states that more needs to be done in the inner city areas. 14 He had been in prison, 15 He is the accountant.....does my homework. 16 He is the person to ....I 17 London ,...I was born ,is famous for its beauty. 18 Come back at 3.30, .I won't be busy. 19 That is the place,..my sister owns a shop. 20 There was nobody left on the train ,..makes me suspicious. Ex2 join these sentences using relative pronoun 1. she is the nurse .she looked after me. 2. he is the man .I sent the letter to him. 3. that is the chair .I sat on it. 4. they are the bird .I fed them this morning. 5. they are the children.their team won the match. 6. they are the shops. I get these from them. 7. I'm the witness.My evidence led to his arrest. 8. he asked a lot of questions .they were none of his bussiness. 9. she is the women .the film was made in her house. 10.that is the building.I passed by it. was a fact nobody had realised. worte. ng chi bom. ve me

Tinh trùng là có phải là vật sống không ,vì sao?