Cho đa thức A ( x ) = ax² + 5x - 3

Tìm a biết đa thức A ( x ) có 1 nghiệm là x = \(\frac{1}{2}\)

Tính GTBT :

A = 2x² - 3 . \(\left|x\right|\) + 1 với \(\left|x\right|\) = 2

B = 2 . \(\left|x-2\right|\) - 3 . \(\left|1-x\right|\) với x = 4

Rút gọn :

1, A = \(\left|x+1\right|\) - 2 ( x - 3 )

2, B = x - 2 - \(\left|x-3\right|\)

Tìm x \(\in\) Z biết :

a, \(\left|x\right|\) < 3

b, \(\left|x\right|\) > 2

c, \(\left|x\right|\) + 3 > 4

d, \(\left|x+1\right|\) + 1 < 5

Đọc đoạn văn dưới đây :

Mexico City is the capital city of Mexico . It's the biggest city in the world . It has a population of 13,6 million .

Tokyo is capital of Japan . It's smaller than Mexico City . It has a population of 12 million .

The capital of England is London . It's the smallest of these three cities . It has a population of 6,3 million .

Viet Nam's capital is small . It has a population of 6,2 million .

Chọn đáp án đúng :

1 . The biggest city in the world is ........

a, London b, Ottawa c, Tokyo d, Mexico City

2. The smallest of these three cities is .........

a, Tokyo b, London c, Mexico City d, Paris

3. London has a population of ..........

a, 6,3 million b, 13,6 million c, 12 million d, 13,6 million

4. The Capital of Viet Nam is .............

a, Ho Chi Minh b, Hai Phong c, Hanoi d, Hue

Nối các từ ở cột A với các từ cột B :

1 + ...

2 + ...

3 + ...

4 + ...

Hoàn thành bài hội thoại dưới đây , sử dụng các từ cho sẵn trong khung :

have ; want ; why ; camping ; by ; travel ; do ; going

Thanh : What are we going to ( 1 ) .... in the vacation ?

Mai : Let's go ( 2 ) ..... .

Thanh : We don' ( 3 ) ..... a tent . What about ( 4 ) ...... to Hue ?

Mai : I don't ( 5 ) ...... to go to Hue . ( 6 ) ....... don't we go to Huong pagoda ?

Thanh : That's a good idea . How are we going to ( 7 ) ......... ?

Mai : Let's go ( 8 ) ......... minibus .

Thanh : Yes . Good idea .

Điền dạng đúng của động từ trong ngoặc

1 . Lan ................ orange juice at the moment . ( drink )

2. I ............... thirsty now . ( be )

3. My father is going ............... Ha Long Bay . ( visit )

4. They .............. in the kitchen now . ( be )

Chọn đáp án đúng :

1 . I'd like ....... bananas , please !

a, any b, some c, many d, much

2. Lemonade , apple juice and ........ are cold drinks .

a, vegetables b, noodles c, ices tea d, beans

3. She isn't heavy . She is ......

a, thin b, fat c, strong d, light

4. Lan .... aerobic evey day .

a, does b, plays c, goes d, dances

5. .......sports do you play ?

a, What's b, Who c, Which d, How

6. We need a tent to go ...... .

a, fishing b, swimming c, camping d, jogging

7. They are going to stay ..... their uncle and aunt this summer vacation .

a, in b, at c, by d, with

8. What is your nationality ? I am .........

a, Vietnamese b, Vietnam c, in Vietnam d, in Vietnamese

9. what language do you speak ? I speak ........

a, England b, English c, language English

10. There are only two ....... in my country .

a, weather b, seasons c, citadel d, cities

11. .......... do you go to school ? Every afternoon

a, How much b, How often c, How many d, How

12. What do you often do ........ it is hot ?

a, What b, Which c, How d, When