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posted by  Bob on 8/25/2008 9:30:55 PM  |  status: Live  

Set Theory-find a formula

Course Textbook Chapter Problem
N/A Discrete Source ISBN 0536992908 2-1 80
Question Details:
 

 |AÈB| = |A|+|B| - |AÇB| because |A|+|B| counts the elements in A, and B  counts the elements in  AÇB twice.

 

Find a formula for |AÈBÈC| similar to the above. Prove that the formula holds for all sets A,B and C.
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posted by Galois on 8/25/2008 11:07:19 PM  |  status: Live
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