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OpenStudy (anonymous):
Can anyone help me with this please Prove that if A is an nxn idempotent matrix, then (In - 2A)inverse = In - 2A .
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OpenStudy (anonymous):
i should probably be quite, because all i know is that \(A^2=A\) but just for my curiosity, what does \(\ln-2A\) mean in this context?
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