For a matrix (A, AI = A) and (AA^T = I) is true for | Mathematics | SolveeIt | Solveeit

Today, August 18

Question

For a matrix $A, AI = A$ and $AA^T = I$ is true for

A

If A is a square matrix.

B

If A is a non singular matrix.

C

If A is symmetric matrix

D

If A is any matrix.

Answer

If A is a square matrix.

Explanation

Solution

Answer (a) If A is a square matrix.