diff --git a/Exercises/2025/tp11_corr.tex b/Exercises/2025/tp11_corr.tex
index 69ff7c0..4b3474c 100644
--- a/Exercises/2025/tp11_corr.tex
+++ b/Exercises/2025/tp11_corr.tex
@@ -233,7 +233,7 @@
     \begin{enumerate}
         \item $f(x,y) = x + 3y^2$
         \[
-        \frac{\partial f}{\partial x} = 3y^2 \quad \quad \quad
+        \frac{\partial f}{\partial x} = 1 \quad \quad \quad
         \frac{\partial f}{\partial y} = 6y
         \]