Question

Check whether the following matrices are invertible or not:

`[(1, 0),(0, 1)]`

Answer 1

Let A = `[(1, 0),(0, 1)]`

Then, |A| = `|(1, 0),(0, 1)|`

= 1 – 0

= 1 ≠ 0

∴ A is a non-singular matrix.

∴ A is invertible.