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Question

The simplified form of (127)23 is

A

9

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B

-9

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C

19

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D

19

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Solution

Given (127)23=[(13)3]23
=(13)3×23=(13)2 [since,(am)n=a(m×n)]
=(3)2 [Since, [1a]m=am]
=(3)×(3)=9
Hence, the simplified form of the given expression is =9.


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