Question

Tính nhanh

1/6+1/12+1/24+/48+1/96

 

Answer 1

Giải

\(\frac{1}{6}+\frac{1}{12}+\frac{1}{24}+\frac{1}{48}+\)\(\frac{1}{96}\)

\(=\frac{1}{3}-\frac{1}{6}+\frac{1}{6}-\frac{1}{12}\)\(+\frac{1}{12}-\frac{1}{24}+\frac{1}{24}-\frac{1}{48}\)\(+\frac{1}{48}-\frac{1}{96}\)

\(=\frac{1}{3}-\frac{1}{96}\)

\(=\frac{31}{96}\)

Answer 2

1/6 + 1/12 + 1/24 + 1/48 + 1/96

= 1/3 - 1/6 + 1/6 - 1/12 + 1/12 - 1/24 + 1/24 - 1/48 + 1/48 - 1/96

= 1/3 - 1/96

= 31/96

Answer 3

Trả lời: 

    1/6 + 1/12 + 1/24 + 1/48 + 1/96 

= 1/3 - 1/6 + 1/6 - 1/12 + 1/12 - 1/24+ 1/24 -  1/48  + 1/48 - 1/96 
= 1/3 - 1/96  

= 31/96 

#hien#