chọn các từ phát âm khác caccs tù còm lại

A. dug

C. muscic

B. puppet

D. summer

2.Traveling by air is much more expensive than traveling by train

->Traveling by train is much cheaper than traveling by air.

Câu 1: Viết câu hỏi cho các câu sau,dùng từ gợi ý

There are some new students in my class now

->How many students are there in your class now?

Dịch: Hoàn thành cuộc trò chuyện, và tiếp theo hãy thực hành nó với bạn.

b)(x+3)\(^2\)-x\(^2\)=9

(x+3-x)(x+3+x)=9

3(2x+3)=9

2x+3=3

2x=0

x=0

c)\(x^2+4x+4+x^2-6x+9-2x^2+2=9\)

-2x+15=9

-2x=-6

x=3

Anna will take a shower __________ having a bath everyday.

( even though, in spite of, and, instead of )

this is the best computer I have ever used.

I have never used such a good computer.

3n + 8 chia hết cho n + 2 khi  

3n + 8 / n+2 là số tự nhiên  

mà 3n+8/n+2 = (2n+6+n+2)/(n+2) = ((2n+6)/(n+2)) + ((n+2)/(n+2))

= ((2n+4+2)/(n+2)) +1 = ((2n+4)/(n+2)) + (2/(n+2)) + 1

 =((2x(n+2))/(n+2)) +(2/(n+2)) + 1= (2/(n+2)) + 3  

=>2/n+2 là số tự nhiên  

=>2 chia hết cho n +2  

=> n+2 thuộc Ư(2)  

=> n+2 = 1;-1;2;-2  

*TH1: n+2 =1 => n=-1  

*TH2: n+2=-1 => n= -3

 *TH3: n+2=2 => n=0  

*TH4: n+2=-2 => n=-4  

Vậy n=-1 ; n=-3 ; n=0 ; n=-4 thì 3n+8 chia hết cho n+2

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- My sister is more good-looking (good-looking) than I am.

Rewrite these sentences, keeping the original meaning:

- This film is more interesting than that one.

=> That film is not as interesting as this one.