chép mạng à

My future house will be a villa . It will be by the sea . It will be surrounded by tall trees and colorful flowers . There will be a swiming pool in front of  and a large flower garden behind the house . My future house will have 10 rooms and many modern appliances . There will be some robots . They might help me do the housework such as : cleaning the floors , cooking meals and washing clothes . I will have a super smart TV . It might help me contact with my friends from another planets , receive and send mails , and it might also help me order food from supermarket . My future house will be modern and wonderful !

1went

2played

3ate

4took

5had

6didn't buy

7didn't talk

8didn't come

9closed

10didn't return

mấy câu này dể bạn chú ý các dấu hiệu quá khứ nha!!!

mik nghỉ là A

1,25x=25%

x=25/100:125/100

vậy x = 1/5 ( đả rút gọn)

còn cái nịt

có câu hỏi đâu???

*Thay x=1=>f(1)+f(-1)=1+1=2

*Thay x=-1=>f(-1)-f(1)=-1+1=0

=>f(1)+f(-1)-(f(-1)-f(1))=2-0

=>2.f(1)=2

=>f(1)=1