按规律填数:2.51,0.4,(),(),0.0256.

来源:学生作业学帮网 编辑:学帮网 时间:2024/06/17 22:38:27

按规律填数:2.51,0.4,(),(),0.0256.

0.16 0.064
an=2^(2n-4)/10^(n-2)
你在2.5和1中间少了个逗号,害我费了半天劲.