There is no place like home

cái này cô mk dạy như z.

Cho mk sửa lại chút nha.tại hồi nãy,mami kêu mk nên mk lm vội quá.mk xl nha

1.when do you go to school?

2.what is she waitting for?

3. Whose book is this?

1.When do you often go to school in the morning?

2. What is she waiting for?

3. Whose book is this?

=1/1.2 + 1/2.3 + 1/3.4 +1/4.5 +1/5.6 +1/6.7

=1-1/2 + 1/2 -1/3 +1/3 - 1/4 + 1/4 - 1/5 + 1/5 - 1/6 +1/6 - 1/7

= (1-1/7)+(1/2-1/2)+(1/3-1/3) + ... +(1/6-1/6)

= (1-1/7) + 0+...+0 = 1-1/7 = 7/7 - 1/7 = 6/7

Vậy A =6/7