From 796f13c80dca3ba93edf72f95b9b1bf33053caf6 Mon Sep 17 00:00:00 2001
From: Claude Meny <claude.meny@irap.omp.eu>
Date: Mon, 24 Aug 2020 10:48:35 +0200
Subject: [PATCH] Update textbook.fr.md

---
 .../05.classical-mechanics/vector-analysis/textbook.fr.md  | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/05.classical-mechanics/vector-analysis/textbook.fr.md b/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/05.classical-mechanics/vector-analysis/textbook.fr.md
index 36f00ceb6..7ea014841 100644
--- a/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/05.classical-mechanics/vector-analysis/textbook.fr.md
+++ b/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/05.classical-mechanics/vector-analysis/textbook.fr.md
@@ -679,6 +679,13 @@ $`\displaystyle\dfrac{d\left(\overrightarrow{OM}\right)(t)}{dt}
 \right)`$
 $`=\dfrac{\overrightarrow{OM}(t+dt)-\overrightarrow{OM}(t)}{dt}`$
 
+$`\displaystyle\dfrac{d\overrightarrow{OM}(t)}{dt}
+=\lim_{\Delta t\rightarrow 0}
+\left(
+\dfrac{\overrightarrow{OM}(t+\Delta t)-\overrightarrow{OM}(t))}{\Delta t}
+\right)`$
+$`=\dfrac{\overrightarrow{OM}(t+dt)-\overrightarrow{OM}(t)}{dt}`$
+