A rectangular array of elements that may be real numbers, complex numbers, functions or operators is called a matrix. Let us consider a matrix **A** as follows:

The order of the matrix is *m × n* since it has *n* rows and *n* columns. The matrix **A** can also be written as

Two matrices are called equal if and only if their corresponding elements are equal. Therefore, equal matrices should have equal number of rows and columns.

A matrix having only one column is known as a column vector. If the column vector has n elements, it known as *n* vector or *n* dimensional vector. The column vector is given ...

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