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Question

log2x0.5=log2x, then x equals


A

4

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B

16

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C

8

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D

None of these

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Solution

The correct option is D

None of these


log2x0.5=log2x(log2x)12=12+12log2xlog2x=14+14(log2x)2+12log2x(log2x)22log2x+1=0(log2x1)2=0log2x=1x=2


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