diff --git a/advanced-math/1-exercises/function-and-limit.tex b/advanced-math/1-exercises/function-and-limit.tex
index fc1e641..54a339a 100644
--- a/advanced-math/1-exercises/function-and-limit.tex
+++ b/advanced-math/1-exercises/function-and-limit.tex
@@ -58,7 +58,4 @@
 
 求$\lim_{x\to\infty}$
 
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 \end{document}