Problem

For a given universe , let  where A is finite with . If , how many subsets does B have, if...

For a given universe , let  where A is finite with . If , how many subsets does B have, if

(a) B = A ∪ {x}, where ?


(b) B = A ∪ {x, y}, where x, ?


(c) B = A ∪ {x1, x2, … ,xk}, where ?

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Solutions For Problems in Chapter 3.1