Verify by direct multiplication that the given matrices are inverses of one another. = 4 9 3 7 7-9 -3 4 1.1-[::)--[-] ]. ? 21-[1 + ]-[31] -1 .4- 3. A = [a á].4-'- :[4] be [ - -1 -3 2 b 1 d -b A ad - bc - a provided ad-bc +0.