" Which one is the identity matrix of order "2" "

" .If "A=[[1,2],[-3,-4]]" and "l" is the identity matrix of order "2," then "A^(2)" equals "

" If "A=[[ab,b^(2)],[-a^(2),-ab]]" and "B=I+A," then "|B|^(100)," where "I" is identity matrix of order "2," is "

Let "A" be a 2times2 real matrix and "I" be the identity matrix of order "2" .If the roots of the equation , [|A-xI|=0 be "-1" and "3" ,then the sum of the diagonal elements of the matrix A^(2) is______________

A matrix of order 3xx3 has determinant 2. What is the value of |A(3I)| , where I is the identity matrix of order 3xx3 .

If A= [[1,2],[-3,-4]] and l is the identity matrix of order 2 then A^(2) equals "

" If "A=[[ab,b^(2)],[-a^(2),-ab]]" and "B=I+A" ,then "|B|^(100)" ,where "I" is identity matrix of order "2" ,is "

" If "A=[[ab,b^(2)],[-a^(2),-ab]]" and "B=I+A" ,then "|B|^(100)" ,where "I" is identity matrix of order "2" ,is "

If A=[[5,2],[7,3]] ,then verify that A.adj A=|A|I, where I is the identity matrix of order

If A^(5) is null square matrix and A^(3)!=0 and (I-A) is the inverse of matrix I+A+A^(2)+.........+A^(n) , then possible value of n can be ( I is the identity matrix of same order as that of A )

If A=[[2,-1-1,2]] and I is the identity matrix of order 2, then show that A^(2)=4a-3I Hence find A^(-1).