diff --git a/advanced-math/exercise/2-continuity-and-discontinuity/continuity-and-discontinuity.tex b/advanced-math/exercise/2-continuity-and-discontinuity/continuity-and-discontinuity.tex
index 6e89f80..22cf9f1 100644
--- a/advanced-math/exercise/2-continuity-and-discontinuity/continuity-and-discontinuity.tex
+++ b/advanced-math/exercise/2-continuity-and-discontinuity/continuity-and-discontinuity.tex
@@ -141,4 +141,5 @@ $\therefore x=e$为无穷间断点。\medskip
 
 $\therefore a=1,b=e$。
 
+
 \end{document}