For every square matrix A, there exists an identity matrix of same order such that

Question

For every square matrix A, there exists an identity matrix of same order such that (A) I A=A only (B) Al - Aonly (C) I A=A I=A (D) None of these

Tardigrade Admin · Accepted Answer

The existence of multiplicative identity For every square matrix A, there exists an identity matrix of same order such that |A=A|=A.

Q. For every square matrix $A$ , there exists an identity matrix of same order such that