1.Nam will be 20 next month .(It)

it will be Hoang 's 20th-birthday next month

2.Do you enjoy listening to music ? ( of)

Are you fond of listening to music

3.My sister couldn't swim last year.( Able)

My sister wasn't able to swim last year

4.His height is 5 feet.(tall)

He is 5 feet tall

5.It is not easy to learn English well.( learning)

Learning EL is not easy

6.Nam can speak English very well.9 (able)

Nam is able to speak EL very well

Chúc bạn học tốt

nhiều lắm bạn

trang thi là :ioe

1. I like go fishing => going

2. I like to go to fishing on the weekend =>ko có gì

3, She is very good at swim => swimming

4. Jack prefers decorate his home => decorating

5. I am going to meeting her. => meet

mik bổ sung thêm câu 1 câu 2

1 Every evening, my father watches television

2 Everyday, Mr Hai drive to work but today he going by bus

ta có: f(a)=7a²+2

         f(-a) = 7(-a)²+2=7a²+2

suy ra f(a)=f(-a)

sử dụng hệ quả bun-nhi-a ta có:

VT\(\ge\frac{\left(a+b+c\right)^2}{\left(a+b+c\right)+\left(ab+bc+ca\right)}\)

mà từ giả thiết , kết hợp với bất đẳng thức , ta có:

\(\frac{1}{a}+\frac{1}{b}+\frac{1}{c}\ge\frac{9}{a+b+c}\)=>\(a+b+c\ge9\)

mặt khác: ab+bc+ca\(\le\frac{\left(a+b+c\right)^2}{3}\)

=> VT\(\ge\)\(\frac{3\left(a+b+c\right)^2}{\left(a+b+c\right)\left(a+b+c+3\right)}\ge\frac{3\left(a+b+c\right)^2}{\left(a+b+c\right)\frac{4\left(a+b+c\right)}{3}}=\frac{a+b+c}{4}\)(dpcm)

cu6 hỏi ngu người thì có

99,99=99+99/100=99/100

vậy 99,99=99\(\frac{99}{100}\)luôn rồi ai chả biết

lấy 9999/100 căn cứ vào đâu ra hỗn số dư thừa