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If A=|{:(3,0,0),(0,3,0),(0,0,3):}|, then...

If `A=|{:(3,0,0),(0,3,0),(0,0,3):}|`, then find `A^(4)`

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The correct Answer is:
`[{:(81,0,0),(0,81,0),(0,0,81):}]`
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