Concept
Is { peanut, jelly } an element of the power set of { peanut, butter, jelly }?
Stephen Davies, Ph.D. Version 2.2.2 Through Discrete Mathematics A Cool Brisk Walk / Chapter 1
"hanna }? { { Rihanna }, ∅ }. 40. Is { peanut, jelly } ∈ P ({ peanut, butter, jelly }? Yes, since { peanut, jelly } is one of the eight subsets of { peanut, but- ter, jelly }. (Can you name the other seven?)"
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