Question: Finding Counterexample For problem 1 and 2 answer the given question by finding a proof or a counterexample in M22. 1. Is it true that

Finding Counterexample For problem 1 and 2 answer the given question by finding a proof or a counterexample in M22.
1. Is it true that the sum of invertible n ( n matrices is invertible?
2. Is it true that the only n ( n matrices for which A2 = A are the zero matrix and the identify matrix?

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