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  4. if A =[2&2&1 1&3&1 1&2&2], then A3 - 7A2 + 10A =

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Q. if $A =\begin{bmatrix}2&2&1\\ 1&3&1\\ 1&2&2\end{bmatrix},$ then $A^3 - 7A^2 + 10A = $

Matrices

Solution:

Correct answer is (b) $5I - A$