If three positive real numbers \( a, b, c(c \) P a) are in HP then ...

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If three positive real numbers \( a, b, c(c \)
P
a) are in HP then \( \log (a+c)+\log \)
W
\( (a-2 b+c) \) is equal to
(1) \( 2 \log (c-b) \)
(2) \( 2 \log (a+c) \)
(3) \( 2 \log (c-a) \)
(4) \( \log a+\log b+\log c \)
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