in Mathematics by
Q:
What kind of matrix is A? A = \begin{pmatrix} 1 & 2 & 3 \\ 0 & 5 & 7 \\ 0 & 0 & 9 \end{pmatrix}

​⎝

​⎛

​​

​1

​0

​0

​​

​2

​5

​0

​​

​3

​7

​9

​​

​⎠

​⎞

​​

Upper Triangular

Lower Triangular

Idempotent

Nil Potent

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