If \( a^{x}=b^{y}=c^{z} \) and \( x, y, z \) are in GP then \( \log...

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If \( a^{x}=b^{y}=c^{z} \) and \( x, y, z \) are in GP then \( \log _{c} b \) is equal to
P
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(a) \( \log _{b} a \)
(b) \( \log _{a} b \)
(c) \( \frac{z}{y} \)
(d) none of these
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