Homework: Check if the following matrices are nonsingular Hw5 $\begin{pmatrix} 1 & 2 & 3 \\ 2 & 4 & 5 \\ 0 & 0 & 1 \end{pmatrix}$ Hw6 $\begin{pmatrix} 0 & 1 & 0 & 0 & 0 \\ -2 & 0 & 0 & 0 & 0 \\ 0 & 0 & 3 & 0 & 0 \\ 0 & 0 & 0 & 0 & -4 \\ 0 & 0 & 0 & 5 & 0 \end{pmatrix}$ Hw7 $\begin{pmatrix} 1 & 0 & 0 \\ 0 & 1 & 0 \\ 0 & 0 & 1 \end{pmatrix}$
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If the determinant is non-zero, then the matrix is nonsingular. If the determinant is zero, then the matrix is singular. Show more…
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