20. Let A, B, and C be sets. Show that a) (AUB) C (AUBUC). b) (AnBn...

 

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20. Let A, B, and C be sets. Show that a) (AUB) C (AUBUC). b) (AnBn C) ≤ (ANB). c) (A-B) - CCA-C. d) (A-C) n(C-B) = Ø. e) (B-A) U (C-A) = (BUC) - A. 21. Show that if 4 and Born cots th 20. Let A, B, and C be sets. Show that a) (AUB) C (AUBUC). b) (AnBn C) ≤ (ANB). c) (A-B) - CCA-C. d) (A-C) n(C-B) = Ø. e) (B-A) U (C-A) = (BUC) - A. 21. Show that if 4 and Born cots th

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20 ar To show AUB AUBUC XE AUB XEA XEA XE AUBUC AUB AVBUC Proved by Jo show ANBAC AN... View the full answer