From f5907d49ed916e383d1594ed239e208ed0c1b06a Mon Sep 17 00:00:00 2001
From: "majiahui@haimaqingfan.com" <majiahui@haimaqingfan.com>
Date: Mon, 22 Jan 2024 18:23:50 +0800
Subject: [PATCH] 1111

---
 README.md | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/README.md b/README.md
index e69de29..0a57713 100644
--- a/README.md
+++ b/README.md
@@ -0,0 +1,5 @@
+$$
+s_{\Delta B} = \sqrt{\frac{1}{n-1} \sum_{i=1}^{n} (\Delta B_i - \overline{\Delta B})^2}
+$$
+111
+11
\ No newline at end of file