1. Section 9.4 Multiplicative Inverses of Matices and Matrix Equations

2. The Multiplicative Identity Matrix

4. The Multiplicative Inverse of a Matrix

6. Example

7. A Quick Method for Finding the Multiplicative Inverse of a 2 x 2 Matrix

9. Example

11. Example

12. Example

13. Finding Multiplicative Inverses of n x n Matrices with n Greater Than 2

16. Example

18. Example

19. Solving Systems of Equations Using Multiplicative Inverses of Matrices

23. Example

24. Applications of Matrix Inverses to Coding

26. Encoding the Word MATH

27. Decoding a Word

28. Example

29. (a)
(b)
(c)
(d)

30. (a)
(b)
(c)
(d)