2. If A is an n x n matrix, show that det A = 0 if and only if some column of A is a linear combination of the other columns.

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Q: (b) By Parseval's formula ΣΙΑ*(v)||2 = ΣΣΚΑ*(vi), v;}/2 = ΣΣΚυ;, A(v;)}2 = ΣΙΑ(v;)||2 < 0. ji…

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