1/4+1/8+1/16+1/32简便计算

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1/4+1/8+1/16+1/32简便计算1/4+1/8+1/16+1/32简便计算1/4+1/8+1/16+1/32简便计算原式=1/4+1/8+1/16+1/32+1/32-1/32=1/4+1/

1/4+1/8+1/16+1/32简便计算
1/4+1/8+1/16+1/32简便计算

1/4+1/8+1/16+1/32简便计算
原式=1/4+1/8+1/16+1/32+1/32 -1/32
=1/4+1/8+1/16+1/16-1/32
=1/4+1/8+1/8-1/32
=1/4+1/4-1/32
=1/2-1/32
=15/32

原式=1-1/32
=31/32

m=1/4+1/8+1/16+1/32.....(1)
(1/2)m=1/8+1/16+1/32+1/64 ....(2)
(1)-(2)得
(1/2)m=1/4-1/64=15/64
所以:m=15/32