If three positive real numbers \( a, b, c \) are the \( p \) th, \(...

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If three positive real numbers \( a, b, c \) are the \( p \) th, \( q \) th and \( r \) th term of a G.P., then
\[
(q-r) \log a+(r-p) \log b+(p-q) \log c
\]
(a) is independent of \( p, q, r \)
(b) is independent of \( a, b, c \)
(c) equals a constant
(d) depends on the base of \( \log \)
\( \mathrm{P} \)
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