4.6

GROUP 5 4.6 IDENTITY MATRIX Leader Name LO SHUI SHUANG Team Name TEO SIANG YING LIM WEN HUI CHAI CHONG LI

INTRODUCE AN identity matrix , which when multiplying it to another matrix ,such as A ,the product is the matrix A itself . (n x 1 = 1 x n = n ( n is any number ) There are matrix that works exactly like 1. Such matrix is called an identity matrix . I A = A And A I = A

EXAMPLE ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],We find that AB =BA =A. Therefore, B is an identity matrix .

4.6 A Determing Wheather a given Identity Matrix ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

4.6 B Writing an Identity Matrix and Doing Calculation involving Identity Matrices ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Exercise 4.6 A ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

4.6

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