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" (ii) If "0^(@)<A,B<90^(@)," such that ...

" (ii) If "0^(@)

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If A=[(0,0,0,0),(0,0,0,0),(1,0,0,0),(0,1,0,0)] then (A) A^2=I (B) A^2=0 (C) A^3=0 (D) none of these

If A=[(0,0,0,0),(0,0,0,0),(1,0,0,0),(0,1,0,0)] then (A) A^2=I (B) A^2=0 (C) A^3=0 (D) none of these

If {:A=[(a,0,0),(0,b,0),(0,0,c)]:}," then "A^(-1) , is..... a) [(a,0,0),(0,(1)/(b),0),(0,0,c)] b) [((1)/(0),0,0),(0,(1)/(b),0),(0,0,c)] c) [(a,0,0),(0,(1)/(b),0),(0,0,(1)/(c))] d) [((1)/(a),0,0),(0,(1)/(b),0),(0,0,(1)/(c))]

Let A=[(a,0, 0),( 0,a,0),( 0, 0,a)] , then A^n is equal to [(a^n,0, 0),( 0,a^n,0),(0, 0,a)] (b) [(a^n,0 ,0),( 0,a,0 ),(0, 0,a)] (c) [(a^n,0, 0),( 0,a^n,0),( 0, 0,a^n)] (d) [(n a,0, 0),( 0,n a,0 ),(0, 0,n a)]

Let A=[(a,0, 0),( 0,a,0),( 0, 0,a)] , then A^n is equal to [(a^n,0, 0),( 0,a^n,0),(0, 0,a)] (b) [(a^n,0 ,0),( 0,a,0 ),(0, 0,a)] (c) [(a^n,0, 0),( 0,a^n,0),( 0, 0,a^n)] (d) [(n a,0, 0),( 0,n a,0 ),(0, 0,n a)]

Out of the following matrices, choose that matrix which is a scalar matrix: a) [(0 ,0),( 0, 0)] (b) [(0, 0, 0),( 0 ,0, 0)] (c) [(0, 0),( 0, 0),( 0 ,0)] (d) [(0),(0),( 0) ]