1/2+1/4+1/8+1/16+1/32
=1-1/2+1/2-1/4+1/4-1/8+1/8-1/16+1/16-1/32
=1-1/32
=31/32
1/2 + 1/4 + 1/8 + 1/16 + 1/32
= 1x16/2x16 + 1x8/4x8 + 1x4/8x4 + 1x2/16x2 + 1/32
= 16/32 + 8/32 + 4/32 + 2/32 + 1/32
= 16 + 8 + 4 + 2 + 1 /32
= 31/32
ta có :(1/2+1/8)+(1/4+1/16)+1/30=
=5/8+5/16+1/30
=233/240
ko chắc đúng hôm lâu rùi ko học dạng này
1/2 + 1/4 + 1/8 + 1/16 + 1/32
= 1 - 1/2 + 1/2 - 1/4 + 1/4 - 1/8 + 1/8 - 1/16 + 1/16 + 1/32
= 1 - 1/32
= 31/32
1/2+1/4+1/8+1/16+1/32
=1-1/2+1/2-1/4+1/4-1/8+1/8-1/16+1/16-1/32
=1-1/32
=31/32
