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{\bf Quiz 6}
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Name:
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\item
We say that a square matrix $A$ is skew-symmetric if $A^T=-A$. Let $A$
be a $n\times n$ skew-symmetric matrix with $n$ odd. Prove that $A$ is
not invertible
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\item
Give an example of a $2\times 2$ skew-symmetric matrix that is
invertible.
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