1. Section 6.4 Multiplicative Inverses of Matices and Matrix Equations

2. The Multiplicative Identity Matrix

4. The Multiplicative Inverse of a Matrix

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

8. Example

9. Example

10. Example

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

14. Example

16. Example

17. Solving Systems of Equations Using Multiplicative Inverses of Matrices

20. Example

21. Applications of Matrix Inverses to Coding

23. Encoding the Word MATH

24. Decoding a Word

25. Example

26. (a)
(b)
(c)
(d)

27. (a)
(b)
(c)
(d)