C.Thomas Edison was born

100(chắc chắn lun!!!!!)

Giả sử a>b

Từ đó ta có b>c; c>d; d>e và e>a

Trong khi e<b thì ta lại có a<b (vô lý)

Giả sử a<b thì có b<c; c<d; d<e; e<a

Trong khi e>b thì ta lại có a>b (vô lý)

Do đó a,b,c,d,e bằng nhau

came up again

1/9 nha bạn

50 bạn nhé

MÌNH K BẠN NHÌU RÙI ĐÓ

100 NHA 

1-Would you like me to post some letters for you?

2-Last week, she took her children to the zoo.

3-Although he is poor, he is generous.

4-Despite his good salary, he is unhappy about his job.

5- She started working in this company 5 years ago.

6-Unless she works hard, she will fail the exam.

7-This is fast and comfortable way to travel every where.

\(22\frac{1}{2}.\frac{7}{9}+50\text{%}-1,25\)

= \(\frac{45}{2}.\frac{7}{9}+\frac{1}{2}-\frac{5}{4}\)

= \(\frac{35}{2}\) + \(\frac{1}{2}-\frac{5}{4}\)

= \(\frac{70}{4}+\frac{2}{4}-\frac{5}{4}\)

=\(\frac{67}{4}\)

Chúc bạn học tốt