câu đó nghĩa là 

sở thích của tôi là gì

tôi đoán là học bài

1.    Write the second sentence so that it has the same meaning to the first

1, If you often go swimming, you will keep fit

è Swimming .....will keep you fit........................

         2, It's a good idea to do exersice regularly

è You ………should do exercise regularly…………….........

          3,  Tom’s gained 5 kilos since he quit smoking

è Tom’s put …on 6 kilos since he quit smoking…………………….

2.   Rewrite the sentence, using the given words

1,  You shouldn’t skip your breakfast

è ……It is unhealthy to ski[ your breakfast……………………………………….. (healthy)

          2,  Boys don’t have as much acne as girls

è ……Girls have more acne than boys………………………………………(than)

3,  Doing exersice every day is a good idea

è ………You should do exercise everyday……………………………………(should)

eh

Mình có lúp 5 thui

Sorry :(

Because of being ill, Lan had to stay at home

In spite of working very hard, she is poor

Because she was sick, she had to relax

Although I had breakfast this morning, I felt hungry

1.Because Lan was ill , she had to stay at home => Because of ...Lan's illness, she had to stay at home

2.Althought she works very hard , she is poor => In spite of ...working very hard, she is poor

3.Because of her sickness , she had to relax => Because ...she was sick, she had to relax

4. Despite having breakfast this morning , I felt hungry => Although I had breakfast this morning, I felt hungry

2. A. melody   B. cycling C. collect   D. eggshell

3. A.  fragile   B. fishing   C. gardening   D. gymnastics

4. A. hobby   B. arrange    C. model   D. pottery

5. A. melody   B. monopoly   C. mountain D. allergy

 6. A.  unique   B. calorie   C. unusual   D. conjunction

7. A. compound   B. concentrate   C. coordinate   D. diet

8. A. independent   B. depression   C. attention   D. conjunction

9. A. itchy   B. junk food   C. sickness   D. triathlon 

10.  A. sunburn   B. vegetarian   C. benefit   D. blanket

`(x+1)/2 = (y+3)/4 = (z+5)/6 = (2x + 2)/4 = (4z + 20)/24`

Áp dụng t/chất dãy tỉ số bằng nhau: 

`=> (x+1)/2 = (y+3)/4 = (z+5)/6 = (2x + 2)/4 = (4z + 20)/24 = (2x + 2 + y + 3 -4z - 20)/(4 + 4 - 24) = (-1 + 2 + 3 - 20)/(-16) = (-16)/(-16) = 1`

`=> {((x+1)/2 = 1 -> x = 1 . 2 - 1 = 1),((y+3)/4 = 1 -> y = 1 .4 - 3 = 1),((z+5)/6 = 1-> z = 1.6-5=1)}`

Vậy ...

Đề yêu cầu gì vậy bạn?

Lời giải:

$|x|\geq 6\Rightarrow x\geq 6$ hoặc $x\leq -6$

Với điều kiện như thế này thì không liệt kê được toàn bộ phần tử của $B$ bạn nhé.