若a1=1−1/m,a2=1−1/a1,a3=1−1/a2,…;则a2011的值为_.(用含m的代数式表示)
问题描述:
若a1=1−
,a2=1−1 m
,a3=1−1 a1
,…;则a2011的值为______.(用含m的代数式表示) 1 a2
答
∵a1=1−
,a2=1−1 m
,a3=1−1 a1
,…;1 a2
∴a2=1-
=1-1 1−
1 m
,a3=1-m m−1
=m,a4=1-1 1−
m m−1
,1 m
∵
=670…1,2011 3
∴a2011的值为:1-
.1 m
故答案为:1-
.1 m