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Linear AlgebraHardDeterminants & Inverses

Determinants & Inverses · Hard problem

For which value of kk is A=(k−3−31−21−3−20)A = \begin{pmatrix}k & -3 & -3\\1 & -2 & 1\\-3 & -2 & 0\end{pmatrix} singular (not invertible)?