Question

Tính 1/2+1/4+1/6+...+1/32

Answer 1

1/2+1/4+................+1/32

=(1-1/2)+(1/2-1/4)+.................(1/16-1/32)

=1-(1/2-1/2)+...............+(1/16-1/16)-1/32

=1-1/32

=31/32

Answer 2

A= 1/2 + 1/4 + .... + 1/32

2A= 1 + 1/2 + .... + 1/16

2A-A= 1 + 1/2 + ... + 1/16 - 1/2 - 1/4 - ..... - 1/32

A= 1 - 1/32

A= 31/32

Answer 3

31/32