Question

Are these sets closed under multiplication?

Answer 1

What are the sets?

Answer 2

The product of an even number and an even number


The product of 0 and 0


The product of a perfect square and a perfect square

Answer 3

I'm guessing that they are, but I just want a double check.

Answer 4

a set is closed under multiplication if multiplying one element of the set by another always results in another member of the set

Answer 5

the first one is closed under multipication

Answer 6

- yes they all are

Answer 7

OK. I have one doubt though. Would zero and zero be considered a set?

Answer 8

yes - it is written as {0}

Answer 9

Alright. Thanks! C:

Answer 10

yw