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Question

The least value of 2log100aloga(0.0001), a>1 is

A
2
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B
3
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C
4
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D
None
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Solution

The correct option is C 4
E=2 log100aloga(100)2
=[2 log100a+2 loga100]
2.2[log100a.loga.100]12
=4[logaa]12=4

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