ouyangrong1974
幼苗
共回答了11个问题采纳率:90.9% 举报
a_2 = 1/ (1-a_1) = 1/ (1- 1/2) = 2
a_3 = 1/ (1-a_2) = 1/ (1- 2) = -1
a_4 = 1/ (1-a_3) = 1/ (1-(-1)) = 1/2 = a_1
因此.
a_4 = a_1
a_5 = a_2
a_6 = a_3
---------
a_2013 = a_2010 = a_2007 = ----= a_3 = -1
(2013= 3* 671,2010= 3*670,----)
1年前
追问
4
qaz_xsw
举报
能说得清楚点吗?只需要告诉我a2013等于多少就可以了,快快快!!!十万火急啊!!! 答案是-1吗