Question

(1981*1982-990):(1980*1982+992)

1/2+1/4+1/8+.........+1/2014

các bạn ghi cách làm cho mình nha

ai nhanh đc like

 

Answer 1

(1981*1982-990):(1980*1982+992) = 1

1/2+1/4+1/8+.........+1/2014 = 2013/2014

Answer 2

(1981 x 1982 - 990) : (1980 x 1982 + 992)

=(1980 x 1982+1982 -990) : (1980 x 1982 +992)

=(1980 x 1982 + 992) : ( 1980 x 1982 + 992)

=1