1. (3 points) What best describes the following matrix? $\begin{bmatrix} 1 & 3 & -5 & 0 \ 0 & 0 & 1 & -2 \ 0 & 0 & 0 & 1 \ 0 & 0 & 0 & 0 \end{bmatrix}$ (a) A is not in row echelon form. (b) A is in row echelon form, but not reduced row echelon form. (c) A is in row echelon form and reduced row echelon form.
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All nonzero rows are above any rows of all zeros. 2. The first nonzero entry of each nonzero row (called the leading entry) is 1. 3. Each leading entry is in a column to the right of the leading entry of the row above it. 4. All entries in a column below a leading Show more…
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