Question

If A = {5, 3, 6, 10, 12, 15, 13} and B = {12, 25, 21, 5, 13}, find A ∪ B.A. { }B. {5, 12, 13}C. {5, 3, 6, 9, 12, 15, 13}D. {3, 5, 6, 10, 12, 13, 15, 21, 25}

Answer 1

`D)A\cup B=\lbrace3,5,6,10,12,13,15,21,25\rbrace`

Step-by-step explanation

To find A ∪ B, we have to find the set of all the numbers that are contained in sets A and B.

Therefore, we have that:

`A\cup B=\mleft\lbrace3,5,6,10,12,13,15,21,25\mright\rbrace`

The answer is option D.