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Problem 3. (4 marks) Let A={x,y},B={a,b,c} and C={1,2}. 1. Find BA. 2. Find ABC. 3. How many elements are in the product ABC. 4. Describe

Problem 3. (4 marks) Let A={x,y},B={a,b,c} and C={1,2}. 1. Find BA. 2. Find ABC. 3. How many elements are in the product ABC. 4. Describe ZZ

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