Mathematics General Science Test Medium Mode

Sr. #	Questions	Answers Choice
1	A and B be two square matrices and if their inverse exist the (AB)-1 =	A-1 B-1 AB-1 A-1B B-1A-1
2	If A and B are two matrices such that AB = B and BA = A then A2 + B2 =	2 AB 2 BA A + B AB
3	If A is a skew-symmetric matrix of order n and P, any square matrix of order n.prove that P' AP is	Skew-symmetric Symmetric Null Diagonal
4	(ABC)' =	CBA' CBA C'B'A C'B'A'
5	The set (Z, +) forms a group	Forms a group w.r.t addition Forms a group w.r.t multiplication Non commutative group w.r.t multiplication Doesn't form a group

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