If A is a non-diagonal involutory matrix, then

If A is non-diagonal involuntary matrix, then A-I=O b. A+I=O c. A-I is nonzero singular d. none of these

If A is non-diagonal involuntary matrix, then A=I=O b. A+I=O c. A=I is nonzero singular d. none of these

If A is non-diagonal involuntary matrix, then a. A-I=O b. A+I=O c. A-I is nonzero singular d. none of these

If A is non-diagonal involuntary matrix,then A=I=O b.A+I=O c.A=I is nonzero singular d.none of these

A square matrix A is used to be an idempotent matrix if A^(2) = A . If A is a non-singular idempotent matrix, then-

If A is a non - null diagonal matrix of order 3 such that A^(4)=A^(2) , then the possible number of matrices A are

Which of the following statements is incorrect for a square matrix A?(|A|!=0) (1) If A is a diagonal matrix then A^(-1) will also be (2) If A is a symmetric matrix then A^(-1) will also be a symmetric matrix (3) If A^(-1)=A rArr A is an idempotent matrix (4) If A^(-1)=A rArr A is an involutory matrix

If A is a diagonal matrix of non-positive entries and order 3 such that A^2=I , then

If A is a diagonal matrix of order 'n 'such that A^(2)=A. then number of possible values of matrix A is

The matrix A=[-5-8 0 3 5 0 1 2-] is a. idempotent matrix b. involutory matrix c. nilpotent matrix d. none of these