Question

tính :1/2- 1/4 -1/8 -1/16

Answer 1

1/2-1/4-1/8-1/16=1/16

Answer 2

Hiệu trên bằng:

1/2-1/4-1/8-1/16=1/16

Đáp số: 1/16

Answer 3

Hiệu sẽ bằng 1/16.

Answer 4

\(\frac{1}{2}-\frac{1}{4}-\frac{1}{8}-\frac{1}{16}\)

\(Ta\)\(có:\)\(\frac{1}{2}-\frac{1}{4}=\frac{1}{4};\frac{1}{2}-\frac{1}{4}-\frac{1}{8}=8\)

\(\Rightarrow\frac{1}{2}-\frac{1}{4}-\frac{1}{8}-\frac{1}{16}=\frac{1}{16}\)

Answer 5

ta có : 

1/2+1/4+1/8+1/16

Sx2= [ 1/2 + 1/4 + 1/8 + 1/16 ] x2

Sx2 = 1 + 1/2 + 1/4 + 1/8

Sx2 - S =1 + 1/2 +1/4 + 1/8 - 1/2 - 1/4 - 1/8 -1/16

Sx2 - S = 1 - 1/2 + 1/2 - 1/4 + 1/4 - 1/8 + 1/8 - 1/16

S = 1 - 1/16

S = 15/16