I'm having a hard time with these few problems.
It's been ages since i've done anything with sets so I have pretty much forgotton everything.
I've been battling with these problems for 3 days now and to be honest haven't got nowhere so I'm pretty much in trouble since deadline for 'em is tomorrow
Any you guys could give a hand with these? Would really really appreciate it!
Ps. Sorry for bad english
Proof identity of sets;
(problems in attached image)