Question: Question 2 (4 points). For any A E M2,2(R), we define f( A) = rank(A). Is f(A) a norm ? You need to check all

Question 2 (4 points). For any A E M2,2(R), we define f( A) = rank(A). Is f(A) a norm ? You need to check all 4 axioms: If yes, prove it. If not, give examples to all violated axioms of a norm

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