1.

|Am x n| = 3 |adj A| = 243 then the value n is _______(a) 4 (b) 5 (c) 6 (d) 1

Answer»

(b) 5

|adj A| = |A|n - 1 , n is order of matrix 

243 = 3n - 1 

34 = 3n - 1 

n = 5



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