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If 
is a singular matrix, then x is?
Correct Answer Is : (-25/13) If A = 
, then A is?
Correct Answer Is : Non-singular If A = 
, B = 
and AB = I , then x = ? Correct Answer Is : 1 In a skew symmetric matrix, the diagonal elements are all? Correct Answer Is : Zero If A and B are two matrices such that AB = B and BA = A, then A2 + B2 = ? Correct Answer Is : A + B If A = 
, then [tr (A)] = ? Correct Answer Is : 23 In order that the matrix 
be non-singular, λ should not be equal to? Correct Answer Is : 4 If A = 
and A2 = O, then (a,b) = ? Correct Answer Is : (-2, -2) If A = 
and A2 is the identity matrix, then x = ? Correct Answer Is : 0 If A is a symmetric matrix, then matrix M`AM is? Correct Answer Is : Symmetric