=3/2x( 1/3-1/5+1/5-1/7-1/7+....+ 1/97-1/99)

=3/2x( 1/3-1/99)

=3/2x 32/99

= 16/33

Bạm thử vào câu hỏi tương tự xem!@@@

Dùng từ gợi ý viết thành câu hoàn chỉnh :

1. Ha Long Bay/be/famous/many/beautiful/islands.

=> Ha Long Bay is famous with many beautiful islands.

2. Lan/feel/nervous/when/come/see/dentist.

=> Lan felt nervous when she came to see dentist.

3. If/someone/have/flu/they/keep/sneeze.

=> If someone has flu , they will keep sneeze .

4. Mr.Hai/not/go/work/yesterday/because/sickness.

=> Mr.Hai didn't go to work yesterday because of his sickness

1. Are the questions going to easy ?

2. Is the film going to start now ?

2541 + 84712 = 87253

most beautiful

1. seen

2. was meet

1. wants

2. any

3. many

4. any

5. how much

6. cooks

7. some

8. many

9. about

10. any