If A=(1.4.7.9) and B=(4,5,6,7,8)
Find:
n(A)=
To find n(A), we need to count the number of elements in set A.
Given that A=(1, 4, 7, 9), we can count the number of elements by simply counting them.
Counting the elements in set A, we have:
1
4
7
9
Therefore, n(A) = 4, and the answer is 4.