Question

Let U={0,1,4,9,16,25,36,49,64,81}, A={0,9,16,36,64}, and B={1,9,25,49,81}. Find |A|

a) 5
b) {5}
c) 10
d) {10}

Answer 1

Set A has 5 unique elements, so the number of elements |A| is 5.

Step-by-step explanation:

The student is asking to find the number of elements in set A. The set A is given as A={0,9,16,36,64}. To find the number of elements, we simply count each unique element in the set. In this case, there are 5 unique elements in set A. Therefore, the number of elements in set A, denoted as |A|, is 5.