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The number of distinct eigenvalues of the matrix
$$A=\begin{bmatrix} 2&2&3&3\\0&1&1&1\\0&0&3&3\\0&0&0&2 \end{bmatrix}$$
is equal to ____________.
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Diagonal elements of Upper Triangular Matrix i.e. 2,1,3,2
Distinct elements are 1,2,3
Ans is 3

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