Prove the generalized Addition Principle by use of the Well-Ordering Principle. That is
Chapter 21, Problem 21.11(choose chapter or problem)
Prove the generalized Addition Principle by use of the Well-Ordering Principle. That is, please prove the following: Suppose A1, A2, . . . , An are pairwise disjoint finite sets. Then jA1 [ A2 [ [ Anj D jA1j C jA2j C C jAnj:
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