1\2 + 1\4 + 1\8 + 1\16 + 1\32 + 1\64 + 1\128
1/2 +1/4+ 1/8 +1/16 + 1/32 + 1/64 +1/128
1/2 +1/4 +1/8 + 1/16 + 1/32 +1/64 +1/128 =
a = 1/2 +1/4+1/8+1/16+1/32+1/64+1/128 = ?
1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256
1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256 = ?
1/2+1/4+1/8+1/16+1/32+1/64+1/128
1/2+1/4+1/8+1/16+1/32+1/64+1/128
1,tính nhanh:1/2 + 1/4 + 1/8 + 1/16 + 1/32 + 1/64 + 1/128
