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[" 3.If "A=[[1,2],[4,2]]" ,then show tha...

[" 3.If "A=[[1,2],[4,2]]" ,then show that "|2A|=4|A|],[" - 4.If "A=[[1,0,1],[0,1,2],[0,0,4]]" ,then show that "|3A|=27]

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