Question

The number of matrices having 7 elements is ......
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Answer 1

natural number whose product is 7.

All ordered pairs are 1×7,7×11×7,7×1

Hence two types of matrices exists.

(i) Column matrix:If it has only one column.

Hence order of matrix=m×1=7×1.m×1=7×1.

(ii) Row matrix:If it has only one row.

Hence order of matrix=1×n=1×7.