the number of matrices having 7 elements is
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7 elements : find all ordered pairs of natural number whose product is 7. All ordered pairs are 1×7,7×1. Hence it has two matrix 1)column matrix and 2) row matrix
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Matrices having 7 elements:
1) The number of the elements in the matrices given by the formula which is:
product of no of rows and columns in the given matrix.
2) In the question there are only 7 seven elements as we all know that this the prime number.
3) So there are only two way to represent it in terms of the given formula which is:
7×1 and 1×7.
4) So there can be only two matrices which can have 7 elements.
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