1 Define an n xn elementary matrix. (2) 1 3 A where A = 2 (a)...

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1 Define an n xn elementary matrix. (2) 1 3 A where A = 2 (a) If M find the elementary matrix E such that EM -1 2 1 1 3 and write down the inverse of E (3) -2 4 find elementary matrices E1, E2, Es and E4 such that E4 Es E2 E1 M I (b) If M = 2 (4) 1 Define an n xn elementary matrix. (2) 1 3 A where A = 2 (a) If M find the elementary matrix E such that EM -1 2 1 1 3 and write down the inverse of E (3) -2 4 find elementary matrices E1, E2, Es and E4 such that E4 Es E2 E1 M I (b) If M = 2 (4)