有三列数:2 -4 8 -16 32 -64``````` 3 -3 9 -15 33 -63``````` 1 -2
观察下面三行数① 2,-4,8,-16,32,-64…;② 3,-3,9,-15,33,-63,…;③1,
1/2+3/4+7/8+15/16+31/32+63/64+128/127+255/256
1/2+3/4+7/8+15/16+31/32+63/64+127/128+255/256
简算1/2+3/4+7/8+15/16+31/32+63/64
2/1+4/3+8/7+16/15+32/31+64/63+.+128/127
1/2+3/4+7/8+15/16+31/32+63/64=127/128=?
简便计算:1/2+3/4+7/8+15/16+31/32+63/64+127+218
简便计算:1/2+3/4+7/8+15/16+31/32+63/64+127/218
1/2+3/4+7/8+15/16+31/32+63/64=?简便方法!
1/2+3/4+7/8+15/16+31/32+63/64+127/128
2/1+4/3+8/7+16/15+32/31+64/63 要简算
计算:1/2+3/4+7/8+15/16+31/32+63/64=?