Determine whether the series is convergent or divergent. Give reasons for your answers.

$$\sum\_{n=1}^\infty \frac{1}{a\_n}$$

where $a\_1=a\_2=1$ and $a\_{n+2}=a\_{n+1}+a\_n$ for all $n\ge1$.

umm... How do I solve this?
I don't even know how to start...