Question: 1. Prove: (A, U A U UA) An Ann A 2. Prove: jj!=(n+1)! - 1 j=1 3. Prove: if card(A) = n then card

1. Prove: (A, U A U UA) An Ann A 2. Prove: jj!=(n+1)! - 1 j=1 3. Prove: if card(A) = n then card P(A) = 2

1. Prove: (A, U A U UA) An Ann A 2. Prove: jj!=(n+1)! - 1 j=1 3. Prove: if card(A) = n then card P(A) = 2". 4. Prove: for n 5, 2">n.

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