/sci/ - Science & Math

>>9954221
Skip those exercises. That is a complex subject if you've never read something alike before, and it's used again in chapter 13.

The topic of chapter 8 is a basic one in set theory, and is part of the concept of order. I suggest you to read A book of set theory, by Charles C. Pinter. Reading at least two books on set theory (a naive approach and an axiomatic one) is desirable as it is a basic theory anyone studying maths must know.

Finally, don't consult an answer books, because if you do so, then you will never develop your ability to solve problems.