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Union Operation

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Fill in the blanks:For all sets A and B, if A is in the set of B, then A union B in in the set of B. Proof: Suppose A and B are
1. 2 answers
2. asked by heidi
3. 669 views
Find (A upside down U B) upside down U C, givenA = {s,e,t} B = {m,E} C = {f,r,e,e,}
1. 4 answers
2. asked by Luke
3. 3,473 views