mình cảm ơn

b)\(\frac{1}{2}x+\frac{3}{2}x=2014\)

\(2x=2014\)

x=1007

Sai rồi bạn ạ

BĐT Cauchy có dạng:

\(\frac{a+b}{2}\ge\sqrt{ab}\)

Đây là BĐT AM-GM hay BĐT Cauchy tổng quát:

\(\frac{a_1+a_2+...+a_n}{n}\ge\sqrt[n]{a_1a_2...a_n}\)

Với 3 số thì BĐT thế này:

\(\frac{a+b+c}{3}\ge\sqrt[3]{abc}\)

1. 8235

2. 2847600

3. 56980

4. 218960

5. 48326/65

6. 120

7. 207

8. 12737/41

choose the best word or phrase to complete the sentences

1. she looked very...when I told her the news.

A. happy B. happily C. happier D. hapiness

2.his brother prefer detective stories...science fictions.

A.than B. to C. from D. as

3.how long did the meeting...?

A.last B.take C.lose D.go

4.My mother is tired...watching TV.

A. of B.with C.at D. for

5.there are not any good movies...at the moment.

A.in B.on C.at D.about (?)

#Q

mình quên viết là trên tia đối của tia AD lấy E sao cho AD = HE nhé ( D thuộc AH đấy )

1.chim cánh cụt

2.quả núi?

3.Người sắt

4.người

he didn't know about it until he came home

--> Not until he came home did he know about it

#Q