https://loveav.cn/tags/%E5%AF%B9%E6%95%B0/ Recent content in 对数 on 伊特瑞特 https://loveav.cn/%3Clink%20or%20path%20of%20image%20for%20opengraph,%20twitter-cards%3E https://loveav.cn/%3Clink%20or%20path%20of%20image%20for%20opengraph,%20twitter-cards%3E Hugo -- 0.134.3 zh-cn Wed, 25 Sep 2024 10:30:00 +0800 https://loveav.cn/posts/math/log-qd/ Wed, 25 Sep 2024 10:30:00 +0800 https://loveav.cn/posts/math/log-qd/ <!--正文开始--> <p><strong>指数对数 求底</strong></p> <p>已知$x^n=y$ 对应对数 $\log_xy=n$ ,求$x$</p> <p>可以根据换底公式</p> <p>$\log_an=\frac{\ln(n)}{\ln(a)}=y$</p> <p>$\Rightarrow \ln(a)=\frac{\ln(n)}{y}$</p> <p>$\Rightarrow a= e^{(\frac{\ln(n)}{y})}$</p>