\( \lim _{x \rightarrow 0} \frac{7^{x}-1}{\log _{7}(1+3 x)} \) is e...

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\( \lim _{x \rightarrow 0} \frac{7^{x}-1}{\log _{7}(1+3 x)} \) is equal to
\( \mathrm{P} \)
W
(1) \( \frac{1}{3}\left(\log _{e} 7\right)^{2} \)
(2) \( \frac{1}{3}\left(\log _{7} e\right)^{2} \)
(3) \( 3\left(\log _{e} 7\right)^{3} \)
(4) \( 3\left(\log _{7} e\right)^{2} \)
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