Answer
\begin{align}
\sum_{k=1}^{50} 2k = 2 +4+6+... + 98+100
\end{align}
Work Step by Step
We can represent the even integers as 2k. Thus, the sum of the even integers from 2 to 100 can be represented in sigma notation as:
\begin{align}
\sum_{k=1}^{50} 2k = 2 +4+6+... + 98+100
\end{align}