#### Answer

The sequence $a_n$ is monotonic and bounded.

#### Work Step by Step

Consider $a_n=\dfrac{3n+1}{n+1}$ for all $n \in N$
Also, $a_{n+1}=\dfrac{3(n+1)+1}{(n+1)+1}=\dfrac{3n+4}{n+2}$
for all $n \in N$
we can see that $\dfrac{3n+1}{n+1} \lt \dfrac{3n+4}{n+2}$ for all $n \in N$
This means that $a_n \lt a_{n+1}$ for all $n \in N$ .Thus $a_n$ increases and is monotonic.
Now, to check whether the sequence is bounded or not we will consider $0 \lt \dfrac{3n+1}{n+1}=2(\dfrac{n}{n+1})+1$
Also, $\dfrac{n}{n+1} \lt 1$ for all $n \in N$
This implies $0 \lt (2)(1) +1=3$ for all $n \in N$
so, $a_n$ is bounded.
Therefore, we can see that the sequence $a_n$ is monotonic and bounded.