If \( \log x=\left(\frac{\log _{a} y}{\log _{a} x}\right)^{k} \), then \( k= \) W \( \because \)

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If \( \log x=\left(\frac{\log _{a} y}{\log _{a} x}\right)^{k} \), then \( k= \)
W
\( \because \)
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