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3. If IA-10, IBI = 8, and AnB_ 3, then show the following: (a) IA - Bl.. c IAAB 4. Complete the equations helow for arbitrary sets A and B is Al and lBrtthens we did in the clas 4. Complete the equations below for arbitrary sets A and B in terms of |Al and |BI (similar to the ones we did in the class for IAUB) (a) Ar b) min JAnB-... 5 Which of the following are true? (a) AB-(A-B) u (B-A) (b) A B if and only if AAB- (c) A-B-A-(AnB). d) The sets A-Band B- A are disjoint.

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oluston b) 18-Al181-IAne - 12

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