Answer
2
Work Step by Step
$a_n=\frac{2n}{\sqrt {n^2+1}}$
$\lim\limits_{n \to \infty} \frac{2}{\sqrt {(1/n^2)+1}}$
$\frac{2}{1}$
2
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.