Question: Suppose A = {-7+ 2 : EN). (2.1) What is the boundary of A? Provide reasons for your answer. (2.2) Is A open, closed,

Suppose A = {-7+ 2 : " EN). (2.1) What is

Suppose A = {-7+ 2 : " EN). (2.1) What is the boundary of A? Provide reasons for your answer. (2.2) Is A open, closed, both or neither? Provide reasons for your

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