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Q. |
Let P(S) denotes the powerset of set S. Which of the following is always true? |
A. | P(P(S)) = P(S) |
B. | P(S) IS = P(S) |
C. | P(S) I P(P(S)) = {ø} |
D. | S € P(S) |
Answer» D. S € P(S) |
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