5/6+11/12+23/24+47/48/+95/96+191/192+383/384+767/768
2个回答
展开全部
5/6+11/12+23/24+47/48/+95/96+191/192+383/384+767/768
=1-1/6+1-1/12+1-1/48+1-1/96+1-1/192+1-1/384+1-1/768
=8-(128+32+16+8+4+2+1)/768
=8-577/768
=7又191/768
=1-1/6+1-1/12+1-1/48+1-1/96+1-1/192+1-1/384+1-1/768
=8-(128+32+16+8+4+2+1)/768
=8-577/768
=7又191/768
追问
5/6+11/12+23/24+47/48/+95/96+191/192+383/384+767/768
=1-1/6+1-1/12+1-1/48+1-1/96+1-1/192+1-1/384+1-1/768
=8-(128+64+32+16+8+4+2+1)/768
=8-255/768
=7又513/768
=7又171/256
是对的
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