Làm tính trừ

\(\dfrac{3x^2+5x+1}{x^3-1}-\dfrac{1-x}{x^2+x+1}-\dfrac{3}{x-1}\)

1.Viết chương trình nhập vào 3 số a,b,c. Tính TBC của 3 số đó. In kết quả ra màn hình

2. Viết chương trình nhập vào giá trị x. Tính gia trị của biểu thức S = 1/x^2

3. Viết chương trình nhập vào 2 số x và y. Đổi giá trị x và y cho nhau

In giá trị x và y ra màn hình

Cho hình chữ nhật ABCD hai đường chéo AC và BD cắt nhau tại O. Lấy E là điểm bất kì thuộc đoạn OA. Đường thẳng BE cắt AD tại M .Qua D vẽ một đường thẳng song song BM, đường thẳng này cắt BC tại F và AC tại N.

a. Tứ giác BMDF là hình gì? vì sao?

b. Chứng minh tam giác ABC =tam giác ODN.

c. Qua E vẽ một đường thẳng song song BD, đường thẳng này cắt AC tại H ,cắt CD kéo dài tại I. Gọi O là trung điểm IH. Chứng minh OO'// DF

d. Gọi K là điểm đối xứng với D qua A. chứng minh K,B, M thẳng hàng

I-Complete the second sentences so that it has a similar meaning to the first

1. The music the band played was very noisy. -> The band

2. Mr Lam said: Lam should practice speaking English every day. -> Mr.Lam said

3. Mr Lam said: Thien should learn more new words by heart -> Mr.Lam said

4. Mr Lam said: Binh should make a list of new words in alphabetical order. -> Mr Lam said

5. Mr Lam said: Lac should do all the grammar exercises -> Mr.Lam said

6. Mr.Lam said: Ha should learn how to spell and write new words

I. Put the following sentences into Reported Speech

1. Have you seen this film before? He asked me

2. Is your school near here? She said

3. Tom asked his friend, Do you go to school by bus

4. I asked Mary: Can you use a computer?

5. Mr. Ba said: Does your father live here?

6. Have you ever seen a tiger? He asked me

7. Did you study hard for the exam? She asked

8. He asked me, Do you like these trousers?

9. Marry asked me, Will you go to school next week?

10. What's weather like? She asked me

11. How can I solve the problem? I wanted to know

12. What did you think of performance yesterday? She asked me

13. Where is my umbrella? She asked

14. How are you? Martin asked us

15. He asked, Do I have to do it

I. Put the following sentences into Reported Speech

1. What country do you come from? said Bill

2. Where did you spend your holiday last summer? He said to her

3. What are you going to study? He said to Mary

4. What do you think of the canteen coffee? asked Peter

5. Where were you last night? He said to her

6. Tom said to the girl, When did you have this picture taken?

7, He said to me, Are you a teacher?

8. Are you hungry now? She said to me

9. He said to me, do you understand it now?

10. Did you pass the exam, John? The teacher asked

11. Did you phone me yesterday? Tom asked Mary

I. Put the following sentences into Reported Speech

1. What is happened to Mr.Brown? He said to us

2. Who is going to live in the big house? He said to her

3. What will happen to his racehorses? She said to us

4. Who is playing next week? He asked me

5. Which team has won? asked Ann

6. When was the timetable changed? He asked me

7. Why has the 2:30 train been cancelled? said Ann

8. When did you begin learning English? He said to us

9. Why did you think it may be dangerous? He asked her

10. Do you know that the shoes you are wearing aren't a pair? I asked him

11. What games do they play? Tom asked us