If for a matrix `A,A^(2)+I=O` where I is the indentity matrix, then `A=`

if for a matrix A, A^2+I=O , where I is the identity matrix, then A equals

Matrix A such that A^(2)=2A-I , where I is the identity matrix, then for n ge 2, A^(n) is equal to

Matrix A such that A^(2)=2A-I , where I is the identity matrix, then for n ge 2, A^(n) is equal to

If A=({:(1,2),(2,3):}) and A^(2) -KA-I_(2)=O," where "I_(2) is the 2xx2 identitiy matrix, then what is the value of k ?

I^(2) is equal to, where I is identitity matrix.

Matrix A is such that A^(2)=2A-I , where I is the identify matrix. Then for n ne 2, A^(n)=