Question: i need your support to understanding and solve below question a) For any two sets A and B show that (B U C) - A

i need your support to understanding and solve below question

a) For any two sets A and B show that (B U C) - A = (B - A) U (C - A). b) Let f: R\\(3} - R\\{1} be defined by f (x) = x+2 x-3 i. Is fone-to-one? Justify your answer. ii. Find, if exists, f-1

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