Question

A square matrix $A = \lbrack a_{ij}\rbrack$ in which $a_{ij} = 0$for $i \neq j$and $a_{ij} = k$ (constant) for $i = j$is called a

• A. Unit matrix
• B. Scalar matrix
• C. Null matrix
• D. Diagonal matrix

Answer 1

Answer: (B)

Scalar matrix

Answer 2

When $a_{ij} = 0$for $i \neq j$and $a_{ij}$is constant for $i = j$then the matrix $\lbrack a_{ij}\rbrack_{n \times n}$is called a scalar matrix