Question

define a diagonal matrix​

Answer 1

Answer:

In linear algebra, a diagonal matrix is a matrix in which the entries outside the main diagonal are all zero; the term usually refers to square matrices. An example of a 2-by-2 diagonal matrix is , while an example of a 3-by-3 diagonal matrix

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Answer 2

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A square matrix in which every element except the principal diagonal elements is zero is called a Diagonal Matrix.