Tim Dingman
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Tim Dingman
# Q1 If $\det \mathbf{A} = -1,$ then find $\det (\mathbf{7A}).$ ## GT In general, $\det (k \mathbf{A}) = k^2 \det \mathbf{A}.$ Thus, \[\det (7 \mathbf{A}) = 7^2 (-1) =...