Given the two sets:

A = {1, 2, 3}
B = {3, 2, 1}
Which of the following is a true statement?

4 ∈ B
A B
A is an infinite set
none of the above

I'm guessing the first one..

Question

Given the two sets:

A = {1, 2, 3}
B = {3, 2, 1}
Which of the following is a true statement?

4 ∈ B
A  B
A is an infinite set
none of the above

I'm guessing the first one..

anonymous · Answer

$$A \subset B$$ is the second option sorry

anonymous · Answer

is the first one that 4 is an element of the set B?

anonymous · Answer

yes; I could be wrong but I am really not very good at these

anonymous · Answer

is the number 4 in the set?

anonymous · Answer

No, so then that one is out of the question.

anonymous · Answer

and has you're professor distinguished between proper and improper subsets?

anonymous · Answer

No

anonymous · Answer

I'm in a similar section in a class I'm in and the symbol you used in option 2 is the one for a proper subset which means that all the elements of A are in B but A isn't equal to B

anonymous · Answer

$$A \subseteq B$$ would be the improper subset where they are equal

anonymous · Answer

so then the answer would be

anonymous · Answer

none of the above?

anonymous · Answer

It always makes me nervous to pick a 'none of the above' but it seems to be the coreect answer

anonymous · Answer

okay Thank you :)