A square matrix A=[a(ij)] in which a(ij)...

A square matrix `A=[a_(ij)]` in which `a_(ij)=0` for ` i!=j and [a]_(ij)=k` (constant) for i=j is called a (A) unit matrix (B) scalar matrix (C) null matrix (D) diagonal matrix

A

unit matrix

B

scalar matrix

C

null matrix

D

diagonal matrix

Verified by Experts

in square matrix ,
Number of rows = number of columns
`therefore m=n`

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