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Question
Classify the following matrix as, a row, a column, a square, a diagonal, a scalar, a unit, an upper triangular, a lower triangular, a symmetric or a skew-symmetric matrix:
`[(2, 0, 0),(3, -1, 0),(-7, 3, 1)]`
Solution
Let A = `[(2, 0, 0),(3, -1, 0),(-7, 3, 1)]`
As every element above the diagonal is zero in matrix A.
∴ A is a lower triangular matrix.
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