1,3,7,15,( ),( ),127
1 3 7 15 31 63 127的规律是什么
1/2+3/4+7/8+15/16+31/32+63/64+128/127+255/256
数列1 3 7 15 31 63 127的通项公式
1/2+3/4+7/8+15/16+31/32+63/64+127/128+255/256
找规律填数1 3 7 15 31 () 127 255
找规律填数1,3,7,15,31,()127,
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
1,3,7,15,31,(),127,255括号里填多少
1/2+3/4+7/8+15/16+31/32+63/64+127/128