Question

If A = {2, 4, 6, 8, 10, 12, 14} and B = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, what is A union B?

I'm not sure if to put.
1, 2, 2...
or
1,2, 3...

Answer 1

A U B = {set of everything in either A or B}


A U B = {2, 4, 6, 8, 10, 12, 14, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}


Now rearrange and remove duplicates


A U B = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14}

Answer 2

Thanks, I only wanted to know if the duplicates stayed! c:

Answer 3

nope, a set is a collection of UNIQUE items (where order doesn't matter)