From: Andrew Lorimer <andrew@lorimer.id.au>
Date: Mon, 3 Dec 2018 21:54:49 +0000 (+1100)
Subject: modulus function
X-Git-Tag: yr12~288^2~7
X-Git-Url: https://git.lorimer.id.au/notes.git/diff_plain/23471914f31659d0e836156c64bd42858604b14f

modulus function
---

diff --git a/spec/prelim.md b/spec/prelim.md
index 586fc59..ed06b09 100644
--- a/spec/prelim.md
+++ b/spec/prelim.md
@@ -63,3 +63,6 @@ $${(x-h)^2 \over a^2} - {(y-k)^2 \over b^2} = 1$$
 
 ${(x-h)^2 \over a^2} - {(y-k)^2 \over b^2} = 1$ and ${(y-k)^2 \over b^2} - {(x-h)^2 \over a^2} = 1$ are **conjugate hyperbolas**
 
+## Modulus function
+
+$$|x|=\sqrt{x^2}$$
\ No newline at end of file