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Chapter 4: Q16. (page 199)

Determine whether each statement is true or false.

16. Only square matrices have multiplicative identities.

Short Answer

Expert verified

The given statement is true.

Step by step solution

01

­- Definition of square matrix.

A square matrix is a matrix in which number of rows is equal to number of columns.

02

­- Description of step.

The multiplicative identity of a matrixA is an identity matrix I of the same order if .AI=IA=A

It can be noticed that an identity matrix is a square matrix and the multiplicationAI andIA of two matrices will be defined only when the matrixA is a square matrix of the same order as that of .I

Therefore, only square matrices have multiplicative identities because the multiplications of the matrix and the identity matrix will only be defined when the matrix is a square matrix.

03

­- State whether the given statement is true or false.

The given statement is true.

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