Logarithms

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Question : 41 of 85

Marks: +1, -0

If

\;{1}/{\log _{ {a}} x}+\;{1}/{\log _{ {c}} {x}}=\;{2}/{\log _{ {b}} {x}}

then

{a}, {b}, {c}

are in

G.P.
A.P.
H.P.
None

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