You are building a recommendation engine and have a set of products bought by User A and another set for User B. To recommend new products to User A based on User B's purchases, which set operation would you use considering you don't want to recommend products User A has already bought?
- Difference
- Intersection
- Symmetric Difference
- Union
To recommend new products to User A based on User B's purchases while avoiding duplicates, you would use the "Difference" set operation. This will provide products in User B's set that are not in User A's set.
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