Question

Let A = {red, blue} and let B = {3, 4, 5}. Find A X B.

{red, blue, 3, 4, 5}

{(red, 3), (red, 4), (red, 5), (blue, 3), (blue, 4), (blue, 5)}

{ }

{red, blue}

Answer 1

The Cartesian Product of two sets is the set of ordered pairs where one coordinate is an element of one set and the other coordinate is an element of the other.\[A \times B = \{(a,b):a \in A \text{ and } b \in B\} \]

Answer 2

so what is it dnt under stand

Answer 3

Hint: a Cartesian Product is a set of ordered pairs.

Answer 4

In a cross product of sets, we combine every element in the first set with every element of the second. Based on that, I'd say the second answer meets the specification.

Answer 5

It's not a cross product...it's a Cartesian product...they're different.

Answer 6

Yeah, bad terminology on my part.