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Question

If 6(logx2log4x)+7=0, then the possible values of x is/are

A
3
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B
23
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C
8
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D
22/3
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Solution

The correct option is D 22/3
6(logx2log4x)+7=0
6(logx212log2x)+7=0
Put y=log2x
6(1yy2)+7=0
3y27y6=0
(y3)(3y+2)=0
y=3,2/3

x=8,22/3


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