Solve {l}{a_{n}=3+2n,text{elal}2itext{l,}}{a_{1}=3+2=5}

$$\left. \begin{array} { l } { a _ { n } = 3 + 2 n , \text { elal } 2 i \text { l, } } \\ { a _ { 1 } = 3 + 2 = 5 } \end{array} \right.$$

Solve for a_n, n

$$a_{n}=2n+3$$

$$n\in \mathrm{R}$$