3^x.3^x+2.3^x-1=81

=>3^x+x+2+x-1=3^4

=>3^3x+1=3^4

=>3x+1=4

=>x=(4-1):3=1

He is interested in (read) books

=) He is interested in reading books

duy/use/computer/3 days ago

<< Duy used a cmputer 3 days ago

Many things in my new school are different

Chia động từ trong ngoặc:

1. -Did you go to the dentist last week, Nam ?

- Yes.And I went there to check up the filled tooth.

2. Nam's family flew to HCM city last year. There they took a lot of pictures and bought a lot of presents

Chọn đáp án đúng nhất:

1. ................... time do you spend learning English every day ?

A.How much B.How many C.How long D.How of

2. Every one had ..................... at the picnic.

A.good time B.a good time C.good times D.better time

3. Please don't ...............so much noise

A.go B.make C.do D.take

4. Is there anything good ............ TV tonight?

A.on B.in C.near D.at

5.Can you wait ....... please?

A.out B.out of C.outside D.for

6. ....... the next turning on the right, the post office is in front of you

A.Go B.Make C.See D.Take

Cho dạng đúng của từ:

1. In her youth she is very beauty girl. (beautiful)

Smoking is not allowed in the ward.

=> Would you mind not smoking in the ward?