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