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Multiplication of Matrices

If A and B ar...

Question

If A and B are square matrices of the same order and AB = BA = A, then B is called ________ matrix.

A

unit

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B

Scalar

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C

diagonal

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D

row

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Solution

The correct option is A
unit

Multiplicative property states that if A and I are square matrices of same order then AI = IA = A,where I represents unit or identity matrix.

Therefore B = I

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