标签积分下的文章

更新于 2024-02-24 | 分类: 数学 | 作者: Lingle | 2 条评论

date:2023/12/15题目：$$ \int_0^{+\infty}{\frac{\ln x}{x^2+a^2}}\mathrm{d}x $$我们首先尝试做变量代换，转换成常义积分，即令$x=a\tan t$，于是有\begin{align}&\f...

阅读全文...

微博热搜

Warning: file_get_contents(https://weibo.com/ajax/side/hotSearch): Failed to open stream: HTTP request failed! HTTP/1.1 403 Forbidden in /www/wwwroot/typecho/usr/themes/butterfly/functions.php on line 1093

Warning: Trying to access array offset on value of type null in /www/wwwroot/typecho/usr/themes/butterfly/functions.php on line 1094

Warning: Trying to access array offset on value of type null in /www/wwwroot/typecho/usr/themes/butterfly/functions.php on line 1094

Warning: foreach() argument must be of type array|object, null given in /www/wwwroot/typecho/usr/themes/butterfly/functions.php on line 1119