1/3+1/9+1/27+1/81+1/243+1/729要求简便运用到前面的规律规律1/2+1/4=3/4 1/2+1/4+1/8=7/8 1/2+1/4+1/8+1/16=15/161/2+1/4+1/8+1/16+····+1/256=255/156
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![1/3+1/9+1/27+1/81+1/243+1/729要求简便运用到前面的规律规律1/2+1/4=3/4 1/2+1/4+1/8=7/8 1/2+1/4+1/8+1/16=15/161/2+1/4+1/8+1/16+····+1/256=255/156](/uploads/image/z/50877-45-7.jpg?t=1%2F3%2B1%2F9%2B1%2F27%2B1%2F81%2B1%2F243%2B1%2F729%E8%A6%81%E6%B1%82%E7%AE%80%E4%BE%BF%E8%BF%90%E7%94%A8%E5%88%B0%E5%89%8D%E9%9D%A2%E7%9A%84%E8%A7%84%E5%BE%8B%E8%A7%84%E5%BE%8B1%2F2%2B1%2F4%3D3%2F4+1%2F2%2B1%2F4%2B1%2F8%3D7%2F8+1%2F2%2B1%2F4%2B1%2F8%2B1%2F16%3D15%2F161%2F2%2B1%2F4%2B1%2F8%2B1%2F16%2B%C2%B7%C2%B7%C2%B7%C2%B7%2B1%2F256%3D255%2F156)
1/3+1/9+1/27+1/81+1/243+1/729要求简便运用到前面的规律规律1/2+1/4=3/4 1/2+1/4+1/8=7/8 1/2+1/4+1/8+1/16=15/161/2+1/4+1/8+1/16+····+1/256=255/156
1/3+1/9+1/27+1/81+1/243+1/729
要求简便运用到前面的规律
规律
1/2+1/4=3/4 1/2+1/4+1/8=7/8 1/2+1/4+1/8+1/16=15/16
1/2+1/4+1/8+1/16+····+1/256=255/156
1/3+1/9+1/27+1/81+1/243+1/729要求简便运用到前面的规律规律1/2+1/4=3/4 1/2+1/4+1/8=7/8 1/2+1/4+1/8+1/16=15/161/2+1/4+1/8+1/16+····+1/256=255/156
=(729-1)/2/729=364/729
ls错了
这个是3的n次方
1/3+1/9+1/27+1/81+1/243+1/729=728/729
1+3+9+27+81+243+729
1-1/3-1/9-1/27-1/81-1/243-1/729-1/2187
简便计算243+81+27+9+2+1+1/3+1/9+1/27+1/81+1/243
计算:1+1/3+1/9+1/27+1/81+1/243+1/729
1-1/3-1/9-1/27-1/81-1/243-1/729=?
求1+1/3+1/9+1/27+1/81+...+1/243+1/729
计算:1-1/3-1/9-1/27-1/81-1/243-1/729
1/3+1/9+1/27+1/81+1/243+1/729求简便~~~~~~~~~~~~~~~
1/3+1/9+1/27+1/81+1/243+1/729怎简便
3/1+9/1+27/1+81/1+243/1+729/1怎么算?
42+1/3+1/9+1/27+1/81+1/243+1/729
3分之1-9分之1+27分之1+81分之1+243分之1】
1/3+1/9+1/27+1/81+1/243=?(要简便计算)
1/3+1/9+1/27+1/81+……+1/177147
1/3,-1/9,1/27,-1/81,1/243...通项公式是什么
1-1/3+1/9-1/27+1/81-1/243+1/729-1/2187+...=? 拜托各位
1+3+9+27+81+...+3的N次方
1/3+1/9+1/27+1/81+……≈(接近哪个数)