Each entry in a matrix is called an Element.
Element of a set: Numbers, letters of the alphabet or any other object in a set are called elements of the set.
For example, the elements of the set {2, 7, 3} are 2, 3, and 7.
The elements of the matrix
are 2, 5, - 4, and 3.

A. 4
B. 3
C. 2
D. - 4
Correct Answer: D
Step 1: The matrix
has 2 rows and 3 columns.
Step 2: The element in the 2nd row, 2nd column of the matrix is - 4.
Q1: What is the element in the second row, second column of the matrix [[1, 2, 3], [4, -4, 6]]?
Q: What is an element in the context of sets?
A: In set theory, an element is any distinct object that belongs to a particular set. For example, if set A = {1, 2, 3}, then 1, 2, and 3 are the elements of set A.
Q: How do you identify an element in a matrix?
A: Elements in a matrix are identified by their row and column number. For example, the element in the 2nd row and 1st column is denoted as a_{21}.