Let A and B be two sets with a finite number of elements. Show that the number of elements in An B plus the number of elements in AU B is equal to the number of elements in A plus the number of elements in B.
Let A and B be two sets with a finite number of elements. Show that the number of elements in An B plus the number of elements in AU B is equal to the number of elements in A plus the number of elements in B.
Chapter9: Sequences, Probability And Counting Theory
Section9.5: Counting Principles
Problem 38SE: Suppose a set A has 2,048 subsets. How many distinct objects are contained in A?
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