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Let the matrix A=\left[\beginarraylll1 & 0 & 0 \\ 1 & 0 & 1 \\ 0 & 1 & 0\endarray\right] satisfy A^n=A^n-2+A^2-I for n \geqslant 3. Then the sum of all the elements of \mathrmA^50 is : | Watch the step-by-step video solution for this NIMCET PYQ.