Help with my logic homework!

>>378024
what do the symbols mean?

File: Empty-Set-Black.png (9KB, 360x360px) Image search: [Google]

9KB, 360x360px

Sorry, symbols weren't supported. Those are empty sets.

>>378024
step one read
https://en.wikipedia.org/wiki/Subset

or better yet just read the appropriate chapter in your fucking textbook which your professor has probably already told you to read

1 is false, the set on the left contains O but the set on the right does not (it only contains {O})
2 is true because the set on the right actually does contain O
3 is false for the same reason as 1

just imagine that instead of O, {O}, and {{O}}, the were A, B, and C
then your statements would look like:
1. {A}⊆{B}
2. {A}⊆{A, B}
3. {A}⊂{B, C}