1/2-1/4-1/8-1/16-1/32-1/64=?(简便计算)(详细过程)方法不要太深奥了!
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1/2-1/4-1/8-1/16-1/32-1/64=?(简便计算)(详细过程)方法不要太深奥了!
1/2-1/4-1/8-1/16-1/32-1/64=?(简便计算)(详细过程)
方法不要太深奥了!
1/2-1/4-1/8-1/16-1/32-1/64=?(简便计算)(详细过程)方法不要太深奥了!
若设S=1/2-1/4-1/8-1/16-1/32-1/64
即2S=1-1/2-1/4-1/8-1/16-1/32
2S-S=(1-1/2-1/4-1/8-1/16-1/32)-(1/2-1/4-1/8-1/16-1/32-1/64)
=1-1/2-1/4-1/8-1/16-1/32-1/2+1/4+1/8+1/16+1/32+1/64
=1-1/2-1/2-1/4+1/4-1/8+1/8-1/16+1/16-1/32+1/32+1/64
=1/64
1/2-1/4-1/8-1/16-1/32-1/64
=1/4-1/8-1/16-1/32-1/64
=1/8-1/16-1/32-1/64
=1/16-1/32-1/64
=1/32-1/64
=1/64
1/2-1/4-1/8-1/16-1/32-1/64
=1/2-(16+8+4+2+1)/64
=1/2-31/64
=1/64