Question

A square matrix A = [a_ij]_nxn is called a diagonal matrix if a_ij = 0 for ____________.

Options

• `"i = j"`

• `"i" ne "j"`

• `"i" > "j"`

• `"i" < "j"`

Answer 1

A square matrix A = [a_ij]_nxn is called a diagonal matrix if a_ij = 0 for `underline("i" ne "j")`.

Explanation:

Except for diagonal elements, all elements in a diagonal matrix are zero.i.e. a_ij = 0 , if  `"i" ne "j"`.