1.	If , find I so that
		A.		B.
		C.		D.
		Hint
	2.	Find the inverse of
		A.		B.
		C.		D.
		Hint
	3.	Determine whether the pair of matrices are inverses.
		A.	no, because fractions cannot be a part of an inverse
		B.	yes, because each entry in the second matrix is the reciprocal of its corresponding entry in the first matrix
		C.	yes, because A · B = I
		D.	no, because A · B I
		Hint
	4.	In order for a matrix to have an inverse, what must be true?
		A.	ad – bc 0	B.	ad – bc = 1
		C.	ad – bc 1	D.	ad – bc = 0
		Hint
	5.	What is the 4 × 4 identity matrix?
		A.		B.
		C.		D.
		Hint