题干
已知数列{an}满足 a1=1,
=n,n∈N* ，则数列{an}的通项公式是____
| n |
| a |
| n |
| 2 |
| a |
| n |
| + |
| 1 |
| a |
| n |
| + |
| 1 |
答案(点此获取答案解析）
an=
| 2 |
| n |
| ( |
| n |
| + |
| 1 |
| ) |
