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:

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)

a1=1−

1
m
a2=1−
1
a1
a3=1−
1
a2
,…;
∴a2=1-
1
1−
1
m
=1-
m
m−1
,a3=1-
1
1−
m
m−1
=m,a4=1-
1
m

2011
3
=670…1,
∴a2011的值为:1-
1
m

故答案为:1-
1
m