Question

Set Theory

Answer 1

http://assets.openstudy.com/updates/attachments/55bfab49e4b033255003597a-mathmath333-1438630105708-c88889apture.png

Answer 2

I think 2,4,7 and 9 are correct

Answer 3

well i is incorrect since {3,4} is actually an element of A
so it would have been correct if it said:
\[\{3,4\} \in A\]

so you were right about ii.

Answer 4

why do you think iii is wrong?

Answer 5

{{3,4}}
is the set containing the element {3,4} isn't it?
isn't the element {3,4} also in A?

Answer 6

oh 3 is also correcr sry

Answer 7

yep

Answer 8

and what about vi?

Answer 9

I think you got vi and vii mixed up

Answer 10

vi is correct ?

Answer 11

and also you mixed up xi and x

Answer 12

i think (vi) is incorrect