Question

3

nd elementary matrices E1,E2,E3 and E4 such that E4·E3·E2·E1·M = I.

( a )

M =

-1

3

A =

3

2

– 2

4

FM = A where E is elementary

matrices . We want to find inverse of E .

Clearly , we can see that second row

of A is

2 times second row of M.

Row 2 of A =

2 row 2 of M…Math