diff --git a/Exam.md b/Exam.md
index 934abb2..6c73a04 100644
--- a/Exam.md
+++ b/Exam.md
@@ -8,5 +8,9 @@
 		else e::remove_x x t
 
 val remove_x: 'a -> 'a list -> 'a list
+
+# let rec remove_duplicates = function
+	| [] -> []
+	| e::t -> remove_duplicates (remove_x e)::t
 ```