Question

Find the intersection of the sets A = {2, 5, 6, 14, 16} and B = {1, 3, 6, 8, 14}.

Answer 1

The intersection of A and B is going to be the set of ALL the numbers A and B have in COMMON.

What are those numbers?

Answer 2

6 and 14?

Answer 3

Perfect, good job

Answer 4

{6, 14} would be the correct way to write it

Answer 5

thanks

Answer 6

@blurbendy How does union apply?

Answer 7

Union is easier because it's simply the set of EVERYTHING in A and B

{1, 2, 5, 6, 8, 14, 16}

Answer 8

oops, forgot 3, but you get the idea :-)

Answer 9

So when asked to find A X B you would do the same?

Answer 10

A x B is referred to as the Cartesian product, and it is not the same thing

say you had A = {1, 2, 3} and B = {4, 5, 6}

A x B =

{ (1,4), (1, 5), (1,6), (2, 4), (2, 5), (2, 6), (3, 4), (3,5), (3, 6) }

See the pattern?

Answer 11

Ohh I see it now! Thanks :)

Answer 12

No problem!