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If A=1/3[(1,2,2),(2,1,-2),(x,2,y)] satis...

If `A=1/3[(1,2,2),(2,1,-2),(x,2,y)]` satisfies `A^T A=I` , then `x+y=` (a) 3 (b) 0 (c) -3 (d) 1

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RD SHARMA ENGLISH-ADJOINTS AND INVERSE OF MATRIX-All Questions
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  14. If A=1/3[(1,2,2),(2,1,-2),(x,2,y)] satisfies A^T A=I , then x+y= (a) ...

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  15. If A=[(1,0,1), (0,0,1),(a,b,2)] , then a I+b A+2A^2 equals (a) A (b) -...

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  17. If a matrix A is such that 3A^3 +2A^2+5A+I= 0, then A^(-1) is equal to

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  19. If A=[(2,-1),( 3,-2)] , then A^n= [(1, 0),( 0,1)] , if (a) n is an ev...

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  20. If x ,\ y ,\ z are non-zero real numbers, then the inverse of the ma...

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