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7. Classify each of the following as true or false. If false, tell why or give an example showing that it is not true.

(a) For all sets A and B, A – B = B – A

(b) For all sets A,   A


(c) For all sets A, A  A  


(d) The set {r, s, t,. . ., z} is a finite set.

(e) No set can be equivalent to all of its subsets

  • please repost -

    1. Try to post your question in ISO-8859-1 encoding so everyone sees what the special characters are.

    2. You can type certain characters related to sets as follows:
    "& c u p ;" ∪
    "& c a p ;" ∩
    "& s u b ;" ⊂
    "& i s i n ;" ∈
    "& n o t i n ;" ∉
    "& e m p t y ;" ∅
    "& a n d ;" ∧
    "& o r ;" ∨
    Do not include the double quotes nor the intervening spaces.

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