Logarithms

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Question : 55 of 85

Marks: +1, -0

If

a=1+\log _{x} y z, b=1+\log _{y} z x, c=1+\log _{z} x y,

then

a b+b c+c a=-

0
$2 a b c$
$a^{2}+b^{2}+c^{2}$
abc.

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