Answer
2 by 1
Work Step by Step
We know that the dimensions of a matrix is the number of columns by the number of rows. Thus, we see that this is a 2 by 1 matrix.
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.