Question

What's the unit matrix ?

Answer 1

check the explanation below

Explanation:

It's a matrix whose main diagonal elements are all `1` and zeroes elsewhere denoted by `I`

and it's a square matrix `(I_n)`

`color(green)("Number of rows=Number of columns="n`

Example:

`I_2=((1,0),(0,1))`

`I_3=((1,0,0),(0,1,0),(0,0,1))`