已知数列{an}满足an+1+an=4n-3(n∈N),若对任意n∈N,都有an^2+an+1^2>=20n-15成立,则a1的取值范围是

来源：学生作业帮助网编辑：六六作业网时间：2024/05/08 09:04:59

已知数列{an}满足an+1+an=4n-3(n∈N*),若对任意n∈N*,都有an^2+an+1^2>=20n-15成立,则a1的取值范围是已知数列{an}满足an+1+an=4n-3(n∈N*),

已知数列{an}满足an+1+an=4n-3(n∈N*),若对任意n∈N*,都有an^2+an+1^2>=20n-15成立,则a1的取值范围是
已知数列{an}满足an+1+an=4n-3(n∈N*),若对任意n∈N*,都有an^2+an+1^2>=20n-15成立,则a1的取值范围是

已知数列{an}满足an+1+an=4n-3(n∈N*),若对任意n∈N*,都有an^2+an+1^2>=20n-15成立,则a1的取值范围是