2. (6 points) The 50th term of the arithmetic sequence $3, 5, 7, 9 \cdots$ is $\qquad$
【Answer】Solution: $3+(50-1) \times 2$,
$$
\begin{array}{l}
=3+98, \\
=101 .
\end{array}
$$

Answer: The 50th term is 101.
Therefore, the answer is: 101.