diff --git a/theorie-signal/exercices/tp1/x2_frequentiel.m b/theorie-signal/exercices/tp1/x2_frequentiel.m
index 00e5c43..cfd8d90 100644
--- a/theorie-signal/exercices/tp1/x2_frequentiel.m
+++ b/theorie-signal/exercices/tp1/x2_frequentiel.m
@@ -1,5 +1,7 @@
 % x2 freqentiel
 
+f0 = 2;
+
 N = 20;
 fe = 50*N*f0;
 Tps = [0 :1/fe: 1-1/fe];
diff --git a/theorie-signal/exercices/tp1/x2_frequentiel.pdf b/theorie-signal/exercices/tp1/x2_frequentiel.pdf
index ede162b..a946d49 100644
Binary files a/theorie-signal/exercices/tp1/x2_frequentiel.pdf and b/theorie-signal/exercices/tp1/x2_frequentiel.pdf differ