Bài 1: Tìm giá trị nhỏ nhất của các biểu thức sau:

a) \(A=|2x-\frac{1}{3}|-\frac{7}{4}\)                                                           b)\(\frac{1}{3}|x-2|+2|3-\frac{1}{2}y|+4\) 

Bài 2: Tìm giá trị lớn nhất của các biểu thức sau:

a) \(A=2\cdot25-\frac{1}{4}\left|1+2x\right|\)                                           b) \(B=\frac{1}{3+\frac{1}{2}\left|2x-3\right|}\)

Bài 3:tính giá trị lớn nhất , giá trị nhỏ nhất của các biểu thức sau:

a) \(A=0,75-\left|x-3,2\right|\)                                                  b)\(B=2\left|x+1,5\right|-3,2\)

c) \(C=0,7-\left|3x-1\right|\)                                 d)\(D=\frac{1}{\left|x+0,3\right|+0,5}\)                                     

e) \(E=\left|x+1\right|+\left|x+2\right|\)

bài 4:tìm các giá trị của x sao cho biểu thức nhận giá trị dương:

a)\(A=2y^2-4y\)                                                                   b)\(B=5\left(3y+1\right)\left(4y-3\right)\)

bài 5:tính tổng sau:

a)\(A=\frac{1}{10\cdot11}+\frac{1}{11\cdot12}+\frac{1}{12\cdot13}+...+\frac{1}{99\cdot100}\)

b)\(B=\frac{4}{5\cdot7}+\frac{4}{7\cdot9}+...+\frac{4}{59\cdot61}\)

                                          giúp mik nhé! thanks!

Cho tam giác ABC vuông tại A ( AB < AC ). O là trung điểm của BC, trên tia đối của tia OA lấy điểm K sao cho OA= OK. Vẽ AH vuông góc BC tại H. Trên tia HC lấy HD = HA. Đường vuông góc với BC tại D cắt AC tại E

a) CMR: Tam giác ABC bằng tam giác CKA và AO = 1/2 BC

b) CM   AB = AE

c) Gọi M là trung điểm của BE. tính góc CHM

giúp mình câu c nha mình đang cần gấp

A. PHONETICS
1. A. considered B. constructed C. donated D. located
2. A. puppets B. sites C. shrimps D. statues
Choose the word in each group that has the underlined part pronounced differently from the rest

Choose the word whose main stress pattern is placed differently from the others
3. A. volunteer B. unusual C. performance D. curriculum
4. A. donate B. expert C. diet D. collage
B. LANGUAGE FOCUS
Choose the best answer
5. The Temple of Literature ______ in 1070.
A. find B. found C. was found D. was founded
6. Children do more exercise than adults, _____ they are more active.
A. and B. but C. so D. or
7. You can see many interesting portraits in that ______.
A. film B. art gallery C. cinema D. theatre
8. She _____ Hue when she was a child.
A. visited B. visits C. has visited D. will visit
9. Peter loves ______ swimming in summer.
A. go B. going C. goes D. went
10. Eat less fast. food to keep you from ______ fat
A. gaining B. reducing C. getting D. putting
11. Watching too much television is not good _____ your eyes.
A. at B. for C. with D. to
12. Be a Buddy has education for street children.
A. given B. spent C. provided D. helped
13. More and more people _______ going to work by bike in the future.
A. enjoy B. enjoys C. will enjoys D. enjoyed
14. Would you like ______ noodles?
A. a B. an C. some D. any
15. Khue Van Pavilion is ______ as the symbol of Hanoi.
A. regarded B. surrounded C. expected D. considered
C. WRITING
Write the second sentence so that it has a similar meaning to the first
16. People speak English all over the world.
English ………………………………………………………………………………………………………………………………………………
17. Did you buy this dictionary two weeks ago?
Was ………………………………………………………………………………………………………..…………………………………………
18. It started to rain 30 minutes ago.
It has ………………………………………………………………………………………………………………………………………………..
19. My house is different from yours.
Your house isn’t …………………..……………………………………………………………………………………………………………
20. Hanoi is larger than Hai Phong.
Hai Phong isn’t …………………………………………………………………………………………………………………………………

21. I want to eat ice creams. I have a sore throat. (BUT)
……………………….…………………………………………………………………………………………………………………………………
Write full sentences using the suggested words
22. You / find / climb mountains / challenging?
……………………………………………………………………………………………………………………………………………………………
23. How many / apple / there / fridge?
……………………………………………………………………………………………………………………………………………………………
24. How much / rice / Nam / eat / lunch?
……………………………………………………………………………………………………………………………………………………………
25. Pho / most popular / food / Vietnam.
……………………………………………………………………………………………………………………………………………………………
Correct the mistakes
26. Tony learned a lot since he started this English course.
……………………………………………………………………………………………………………………………………………………………
27. They can play badminton. I can play bdminton, either.
……………………………………………………………………………………………………………………………………………………………
D. READING
The Temple of Literature is about 10 minutes away from Hoan Kiem Lake. It was constructed in 1070
under Ly Thanh Tong’s dynasty, first to honor Confucius and nowadays to celebrate the doctorate and
high rank scholar of Vietnam. In 1076, Emperor Ly Nhan Tong continued the work and built the Imperial
Academy as the first university of Vietnam.
The Temple is divided into five courtyards. The first courtyard is from the main gate to Dai Trung
Gate. The second is with Khue Van Pavilion. The pavilion symbol is used on the street signs of Ha Noi.
The third courtyard is the place where the doctorate names were listed on the stone tablets above
tortoise backs. The fourth courtyard is dedicated for Confucius and his 72 honored students, as well as
Chu Van An - one of the most famous teachers at the Imperial Academy. The last is also the farthest
courtyard is Thai Hoc House, which was used as the Imperial Academy. Thai Hoc House holds a small
collection of old-time costumes for students and scholars.
28. Where is the Temple of Literature?
……………………………………………………………………………………………………………………………………………………………
29. When and by whom was it built?
………………………………………………………………………………………………………………..…………………………………………
30. How many courtyards are there in the Temple of Literature?
……………………………………………………………………………………………………………………………………………………………
31. Which courtyard is with Khue Van Pavilion?
……………………………………………………………………………………………………………………………………………………………
32. What is the Pavilion symbol used on?
……………………………………………………………………………………………………………………………………………………………

A. PHONETICS
1. A. considered B. constructed C. donated D. located
2. A. puppets B. sites C. shrimps D. statues
Choose the word in each group that has the underlined part pronounced differently from the rest

Choose the word whose main stress pattern is placed differently from the others
3. A. volunteer B. unusual C. performance D. curriculum
4. A. donate B. expert C. diet D. collage
B. LANGUAGE FOCUS
Choose the best answer
5. The Temple of Literature ______ in 1070.
A. find B. found C. was found D. was founded
6. Children do more exercise than adults, _____ they are more active.
A. and B. but C. so D. or
7. You can see many interesting portraits in that ______.
A. film B. art gallery C. cinema D. theatre
8. She _____ Hue when she was a child.
A. visited B. visits C. has visited D. will visit
9. Peter loves ______ swimming in summer.
A. go B. going C. goes D. went
10. Eat less fast. food to keep you from ______ fat
A. gaining B. reducing C. getting D. putting
11. Watching too much television is not good _____ your eyes.
A. at B. for C. with D. to
12. Be a Buddy has education for street children.
A. given B. spent C. provided D. helped
13. More and more people _______ going to work by bike in the future.
A. enjoy B. enjoys C. will enjoys D. enjoyed
14. Would you like ______ noodles?
A. a B. an C. some D. any
15. Khue Van Pavilion is ______ as the symbol of Hanoi.
A. regarded B. surrounded C. expected D. considered
C. WRITING
Write the second sentence so that it has a similar meaning to the first
16. People speak English all over the world.
English ………………………………………………………………………………………………………………………………………………
17. Did you buy this dictionary two weeks ago?
Was ………………………………………………………………………………………………………..…………………………………………
18. It started to rain 30 minutes ago.
It has ………………………………………………………………………………………………………………………………………………..
19. My house is different from yours.
Your house isn’t …………………..……………………………………………………………………………………………………………
20. Hanoi is larger than Hai Phong.
Hai Phong isn’t …………………………………………………………………………………………………………………………………

21. I want to eat ice creams. I have a sore throat. (BUT)
……………………….…………………………………………………………………………………………………………………………………
Write full sentences using the suggested words
22. You / find / climb mountains / challenging?
……………………………………………………………………………………………………………………………………………………………
23. How many / apple / there / fridge?
……………………………………………………………………………………………………………………………………………………………
24. How much / rice / Nam / eat / lunch?
……………………………………………………………………………………………………………………………………………………………
25. Pho / most popular / food / Vietnam.
……………………………………………………………………………………………………………………………………………………………
Correct the mistakes
26. Tony learned a lot since he started this English course.
……………………………………………………………………………………………………………………………………………………………
27. They can play badminton. I can play bdminton, either.
……………………………………………………………………………………………………………………………………………………………
D. READING
The Temple of Literature is about 10 minutes away from Hoan Kiem Lake. It was constructed in 1070
under Ly Thanh Tong’s dynasty, first to honor Confucius and nowadays to celebrate the doctorate and
high rank scholar of Vietnam. In 1076, Emperor Ly Nhan Tong continued the work and built the Imperial
Academy as the first university of Vietnam.
The Temple is divided into five courtyards. The first courtyard is from the main gate to Dai Trung
Gate. The second is with Khue Van Pavilion. The pavilion symbol is used on the street signs of Ha Noi.
The third courtyard is the place where the doctorate names were listed on the stone tablets above
tortoise backs. The fourth courtyard is dedicated for Confucius and his 72 honored students, as well as
Chu Van An - one of the most famous teachers at the Imperial Academy. The last is also the farthest
courtyard is Thai Hoc House, which was used as the Imperial Academy. Thai Hoc House holds a small
collection of old-time costumes for students and scholars.
28. Where is the Temple of Literature?
……………………………………………………………………………………………………………………………………………………………
29. When and by whom was it built?
………………………………………………………………………………………………………………..…………………………………………
30. How many courtyards are there in the Temple of Literature?
……………………………………………………………………………………………………………………………………………………………
31. Which courtyard is with Khue Van Pavilion?
……………………………………………………………………………………………………………………………………………………………
32. What is the Pavilion symbol used on?
……………………………………………………………………………………………………………………………………………………………