Prove using the definition
$\forall \epsilon>0, \exists N\in\mathbb{N}, s.t. \quad \forall n>N,$ we have $\quad \mid a_n-L\mid<\epsilon$
Prove using the definition
$\forall \epsilon>0, \exists N\in\mathbb{N}, s.t. \quad \forall n>N,$ we have $\quad \mid a_n-L\mid<\epsilon$