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If log(a)x , log(b)x and log(c)x are in ...

If `log_(a)x` , `log_(b)x` and `log_(c)x` are in HP which one of the following is true?
(1) `(a)/(b+c),(b)/(c+a),(c)/(a+b) ` are in A.P.
(2) `b+c, c+a, a+b ` are in H.P.
(3) `a ,b ,c ` are in G.P.
(4) ` a^(2),b^(2),c^(2) ` are in A.P.

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