Question: Question 1 - 5 marks This question concerns the following subsets of the plane R 2 : A = {(x, y) : x 2 +

Question 1 - 5 marks This question concerns the following subsets of the plane R 2 : A = {(x, y) : x 2 + y 2 4}, B = {(x, y) : x 2}. Prove that A is a proper subset of B.

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