Problem 3: For A Є Matmxn(R) we can consider matrices B€ Matxm(R) such that AB - I. For the specific matrix 1 2 A- 12 -1 find ALL possible matrices B such that AB - I. Hint: Because A and B are not necessarily square this isn't the same as invertiblity, but it is a related idea and you attempt a similar algorithm to the one used to find an inverse of a matriz

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