Đề ghi sai co the la (-x-2)/(x-2)

​

de map mo qua 

\(M=-x-\frac{2}{x}-2\) theo dung bieu thuc cua ban viet

x phai la uoc cua 2

=> x=+-1; +-2

Ngô Việt Hoàng nói đúng đó,ngonhuminh ơi,bạn làm lộn rồi

\(=\frac{14}{3}nha!\)

SECTION A. PHONES (2.0 points)

Choose the word in each group that has the underlined part pronounced differently fromthe rest.

1. A. express B. exciting C. expensive D. excellent

2. A. coffee B. see C. agree D. free

3. A. son B. sugar C. soup D. sing

4. A. palm B. fasten C. classmate D. traffic

5. A. plays B. says C. days D. stays

6. A. dad B. hat C. plant D. happy

7. A. hear B. near C. fear D. pear

8. A. writes B. makes C. packets D. tomatoes

9. A. clown B. down C. own D. town

10. A. breathe B. rhythm C. although D. worth

SECTION B. LEXICO & GRAMMAR (10.0 points)

Part I. Choose the best answer from A, B, C or D to complete these sentences. (4.0 points)

1. At the weekend we can play a ..........................of badminton or join in a football match. A.sport B. game C. sports game D. match game

2. Kien is not very ......................He never plays games A. sport B. sporty C. sporting D. unsporty

3. My brother s watching TV............................I going out with my friends A. and B. but C. or D. so

4. I want to work in television industry,.........................I am working hardA. because B. although C. so D. and

5. Bangkok is ............. capital of Thailand. A. a B. one C. X D. the

6. There are ................. girls in his class.A. not B. no C. none D. any

7. ......... she plays the piano! A. How beautiful B. How beautifully C. What good D. What well

8. On .... we often go out. A. nights of Saturday B. Saturday nights C. Saturday’s nights D. none is correct

9. I don’t want much sugar in coffee. Just ........., please. A. little B. a little C. few D. a few

10. “I’ve just received a scholarship” -”......................!.........................................” A. Really B. Thank you C. Congratulations D. Well

11. They canceled their picnic,.............................the bad weather A. because B. because of C. when D. and

12. ..........................the program is late, we will wait to watch A. When B. Because C. Although D. So

13. You can watch Harry Potter on TV ......................you can read it A. so B. when C. but D. or

14. -“.......................................................................” - “ He is of medium height, with black hair and dark skin A. What is your new friend ? B. What does your new friend look ?C. How is your new friends D. What does your new friend ?

15.” ........................do you play table-tennis ?” - every weekend. A. When B. How often C. How D. What time

16. –“ Excuse me .I am looking for a telephone box” -“ There is one ...............................................”A. straight B. straight ahead C. turn right D. going left

17.-“ Would you me to turn off your computer ?” - “...............................I’ll do it myself .”A. No, thanks B.Yes, please C. Don’t do it D. Of course

18. My parents always say that I .........................take thing without asking A. needn’t B. mayn’t C.shouldn’t D. won’t

19. Vietnam celebrates Tet, but Korea..................A. does B. doesn’t C. celebrate D. celebrates

20. It’s cold. The students .................warm clothes.A .wear B. wears C. wearing D. are wearing

Part II. Supply the correct form or tense of the verbs in the parentheses (3.0 points).

1. Where is your mother? – She is in the kitchen. She ______(cook) the dinner.

2. Your brother often ______ (go) to school by bus last year?

3. He often played football when he ( be ) .....................young .

4. Trung is learning to play the guitar. He ( have ) ...................guitar lessons twice a week.

5. Look! The plane (fly) ............................ toward to the airport. It (land)..........................

6. Take these medicines and you ( feel ) ……………….. better then, Ha .

7. I …………..(have) a birthday party tomorrow evening. Would you ………..(come)?

. ………… he……….. () milk or tea?

9. Where is Nam?- He(watch)…………………… TV in his room at the moment.

10. I often go to school by bicycle but today I ……….. (go) to school by bus.

11. My best friend (write)………………………… me a letter several time.

12. If it (be ) ..............nice tomorrow. We ( plant).......................some young trees.

13. - ...................you ever ( see )....................a real robot at work? - No, never.

14. Do you think there ( be ) ..................a city underwater?

. I (never ,see).............................such a big flower.

16. He ( never meet ) .....................her before.

Part III. Give the correct form of the words in brackets. (2.0 points)

EX. Knowing English well is very (use )…….. -> useful

1 The .........……. of the experiment is about 20 minutes (LONG)

2.She sent her best wishes for my future…… ........(HAPPY)

3. The ……………of this tree are very green and beautiful. ( LEAF )

4. Every year I make a ........................and every year I break it. (RESOLUTE)

5.I don’t believe that the .................can bring us good or bad luck.(FOOT)

6. That’s a.............................designer. She has a lot of new ideals.(CREATE)

7. Nhung is quiet,but sometimes she becomes……………(TALK)

8. They’re famous football................................ (PLAY)

9. They are ........................... about their lesson. (TALK)

10. She told me she would comes so be…………….(PATIENCE)
Part IV. Each sentence below contains an error. Underline it and write the correct answerin the space provided. (2.0 points)

1. I have learnt how swim since 2010.

2. She has worked for this bank since she leaves university.

3. What sweet voice you have!

4. I go to the school library to borrow books twice.

5. Could you tell me the way to the post office ?

6. I received a letter to my friend last week.

7. I have gone to Singapore three times.

8. My brother can’t swim, so he is afraid of water.

9. Don’t eat toomuch salt because it is not good to you.

10.- “Which is the most expensive city in the world ?” – “ I think it’s Tokyo.”

PART 5. Fill in the blanks with the correct prepositions. (1,0 pt)

1. I live only a few yard …..….the bus stop.

2. Last week I played with Duy and I won ........the first time.

3.I’d to stay…..……home tonight. Is there anything interesting…. …TV?

4. A few people are …………. The mountain and they are ……… danger.

5. Take Bus 16 and get get ......at Hoa Binh Park.

6.My father always goes to work ………… his own car.

7. He’s not very good.......................repairing things.

8. Ocean life is ......at 7:30 Laughing out Loud will follow, at 8:00.

SECTION C. READING (4.5 points)

Part I. Choose the best option (a,b,c or d)to complete the passage. (2.points)

What do you do if you want to (1)............ a book in a library? If you know the author’s(2)............ ,go to the author catalogue. Find the title of the book (3)............ check the shelf mark.Make a note of this before you look( 4 )..................the appropriate shelf. If you do not know theauthor’s name, go to the (5)................... Catalogue. If there (6)................ no title catalogue in thelibrary, go to the subject catalogue. Check all the titles which are under the (7)........... you want.Then check the appropriate card, as with the author catalogue. Next look for the book on theshelf. Let the librarian stamp it (8).................... you take it out of the library. If the book isn’t onthe shelf, ask the librarian to get it for you.

1. A. find B. look C.take D. make

2. A. address B. title C. name D. age

3. A. and B. or C. but D. so

4. A. at B. for C. after D. on

5. A. title B. author C. subject D. shelf

6. A. be B. are C. is D. was

7. A. subject B. book C. index D. title

8. A. after B.before C. when D. if 

Part II. Put a word in each gap in the following postcard. (1points)

Fansipan is the highest peak of Vietnam, Laos and Cambodia, so it is called “the Roof ofIndochina” while the local (1).............call it Huasipan. Huasipan means large tottering rock.Fansipan is 3,143 metres (2)...........It is in Lao Cai Province, nine kilometres southwest of Sa PaTown (3)...........the Hoang Lien Son mountain range.Fansipan is now one of the very few eco-tourist spots of Vietnam, with about 2,024 varieties ofplants and 327 types of animal and insects. Many tourist (4) .............the mountain every year . Ifyou climb the mountain from the end of February to march, you (5)...........have a chance toadmire the beautiful blooming flowers in many different colors.

SECTION D. WRITING (3 points)

Part I. Finish each of the following sentences in such a way that it means exactly the sameas the sentence printed before it. (2.0 points).

1. It is essential that you do your homework before going to school.

You must ………………………………………………..…..

2. It is necessary for us to be present at the class discussion on Saturday.

We must …………………………………………………………

3. Hanoi is large, Bangkok is large and Tokyo is the largest.

 Tokyo is ………………………………………………………………

4. It is wrong of us to throw rubbish.

 We mustn’t ……………………………………………….………

5. How many apples does she want?

 How many apples would………………………………..?

6. Learning how to use a computer is very easy

It is ………………………….…………….……………………

7. He drives very carefully.

He is ..………….……………………………………………

8. Students at our school take part in a lot of outdoor activities 

Students at our school do ……………….……………………………..………

9. I find it difficult to find a better solution to that problem.

 I have ...........................................................................................................................

10. Lan is the oldest of the three sisters

 Lan has ............................................................................................................

Part II .Write about( 90 – 100 words) to say about your house. ( 1. Points). (Không đượcviết tên thật vào bài)

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                                                                                          THE END



 

có j đâu

Có gì đâu mà gửi vậy?

\(\left(x^2+x\right)^2-2x^2-2x-15\)

\(=\left(x^2+x\right)^2-\left(2x^2+2x+15\right)\)

\(=\left(x^2+x\right)^2-\left[\left(2x^2+2x\right)+15\right]\)

\(=\left(x^2+x\right)^2-\left[2.\left(x^2+x\right)+15\right]\)

\(=\left(x^2+x\right)^2-2\left(x^2+x\right)-15\) \(\left(1\right)\)

đặt \(x^2+x=t\)

\(\left(1\right)\)\(=\)  \(t^2-2t-15\)

            \(=\left(t-1\right)^2-16\)

            \(=\left(t-1-4\right)\left(t-1+4\right)\)

           \(=\left(t-5\right)\left(t+3\right)\)

thay \(t=x^2+x\) ta có

\(\left(1\right)=\left(x^2+x-5\right)\left(x^2+x+3\right)\)

các câu còn lại tương tự nha

học tốt 

\(\frac{x-1}{2}=\frac{y-2}{3}\Rightarrow\frac{3\left(x-1\right)}{2}=y-2\Rightarrow y=\frac{3\left(x-1\right)}{2}+2=\frac{3\left(x-1\right)+4}{2}\)(1)

\(\frac{x-1}{2}=\frac{z-3}{4}\Rightarrow\frac{4\left(x-1\right)}{2}=z-3\Rightarrow z=\frac{4\left(x-1\right)}{2}+3=\frac{4\left(x-1\right)+6}{2}\)(2)

Từ (1) và (2) => 2x+3y-z=\(2x+3\left(\frac{3\left(x-1\right)+4}{2}\right)-\frac{4\left(x-1\right)+6}{2}=50\)

\(\Rightarrow\frac{4x}{2}+\frac{9\left(x-1\right)+12}{2}-\frac{4\left(x-1\right)+6}{2}=50\)

\(\Rightarrow\frac{4x+9x-9+12-4x+4-6}{2}=50\)

\(\Rightarrow9x+1=100\)

\(\Rightarrow9x=99\)

\(\Rightarrow x=11\)

Vì \(y=\frac{3\left(x-1\right)+4}{2}=\frac{3\left(11-1\right)+4}{2}=\frac{34}{2}=17\Leftrightarrow y=17\)

Vì \(z=\frac{4\left(x-1\right)+6}{2}=\frac{4\left(11-1\right)+6}{2}+\frac{46}{2}=23\Leftrightarrow z=23\)

Vậy   x=11

         y=17

         z=23

\(\Rightarrow\frac{2\left(x-1\right)}{2.2}=\frac{3\left(y-2\right)}{3.3}=\frac{z-3}{4}\) 

\(\Rightarrow\frac{2x-2}{4}=\frac{3y-6}{9}=\frac{z-3}{4}\) 

Áp dụng t/c dãy tỉ số = nhau

\(\Rightarrow\frac{2x-2}{4}=\frac{3y-6}{9}=\frac{z-3}{4}=\frac{2x-2+3y-6-z+3}{4+9-4}=\frac{50-2-6+3}{9}=\frac{45}{9}=5\) 

\(\Rightarrow\hept{\begin{cases}\frac{x-1}{2}=5\Rightarrow x-1=10\Rightarrow x=11\\\frac{y-2}{3}=5\Rightarrow y-2=15\Rightarrow y=17\\\frac{z-3}{4}=5\Rightarrow z-3=20\Rightarrow z=23\end{cases}}\)

Ta có: \(\frac{x-1}{2}=\frac{y-2}{3}=\frac{z-3}{4}\)=> \(\frac{2x-2}{4}=\frac{3y-6}{9}=\frac{-z-3}{4}\)

Áp dụng tính chất của dãy tỉ số bằng nhau, ta có:

\(\frac{2x-2}{4}=\frac{3y-6}{9}=\frac{-z-3}{4}=\frac{2x-2+3y-6-z+3}{4+9-4}\)= \(\frac{50-2-6+3}{9}=\frac{45}{9}=5\).

=> \(\hept{\begin{cases}\frac{x-1}{2}=5\\\frac{y-2}{3}=5\\\frac{z-3}{4}=5\end{cases}}\)=> \(\hept{\begin{cases}x-1=10\\y-2=15\\z-3=20\end{cases}}\)=> \(\hept{\begin{cases}x=11\\y=17\\z=23\end{cases}}\).

148:(x+2)=37

x+2=148 : 37

x+2=4

x=4 -2 

x=2

Bài làm :

\(148:\left(x+2\right)=37\)

\(x+2=148:37\)

\(x+2=4\)

\(x=4-2\)

\(x=2\)

Học tốt

148 : ( x + 2 ) = 37

<=> x + 2 = 4

<=> x = 2

Vậy : x= 2