1.	Does the inverse of exist? If it does not exist, explain why not.
		A.	No; the matrix is not square.
		B.	Yes
		C.	No; the determinant equals 0.
		D.	No; the elements of the principal diagonal are not 1.
		Hint
	2.	If , find N -1.
		A.		B.
		C.		D.
		Hint
	3.	Find the inverse of
		A.		B.
		C.		D.
		Hint
	4.	Determine whether the pair of matrices are inverses.
		A.	no, because A · B I	B.	no, because fractions cannot be a part of an inverse
		C.	yes, because A · B = I.	D.	yes, because each entry in the second matrix is the reciprocal of its corresponding entry in the first matrix.
		Hint
	5.	What is the 4 × 4 identity matrix?
		A.		B.
		C.		D.
		Hint