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Question

If x, y, z are positive then minimum value of
xlogylogz+ylogzlogx+zlogxlogy is
  1. 3
  2. 1
  3. 9
  4. 16

A
9
B
3
C
1
D
16
Solution
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Let a=xlogylogz,b=ylogzlogx,c=zlogxlogy
Now, log(abc)=loga+logb+logc
log(abc)=(logylogz)logx+(logzlogx)logy+(logxlogy)logz=0
abc=1

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