来自丁丽娟的问题
【怎样计算下列各题~①1/2+1/4+1/6+1/31+1/62+1/124+1/248+1/496②1/42+5/42+11/42+13/42+17/42+19/42+23/42+25/42+29/42+31/42+37/42+41/42】
怎样计算下列各题~
①1/2+1/4+1/6+1/31+1/62+1/124+1/248+1/496
②1/42+5/42+11/42+13/42+17/42+19/42+23/42+25/42+29/42+31/42+37/42+41/42
1回答
2020-05-14 19:44