MATH152 April 2013
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Question A 20
Let A, B, C and D be four size invertible matrices. Circle all the options below that are equal to the matrix independent of what A,B,C and D are. No explanation required.
Make sure you understand the problem fully: What is the question asking you to do? Are there specific conditions or constraints that you should take note of? How will you know if your answer is correct from your work only? Can you rephrase the question in your own words in a way that makes sense to you?
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Recall and for invertible matrices.
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Only (d) is correct.
Recall and for invertible matrices. Then
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