start exponential functions notes

diff --git a/methods/stuff.md b/methods/stuff.md
index 37878ddb3f7d8a682a864579eefb109801999438..0424391542e8df6356a8396ac66ea823bfbc867c 100644 (file)
--- a/methods/stuff.md
+++ b/methods/stuff.md
@@ -8,7 +8,7 @@ classoption: twocolumn
 header-includes: \pagenumbering{gobble}
 ---
 
-# random methods shit
+# Exponential and Index Functions
 
 ## Index laws
 
@@ -33,4 +33,11 @@ Used for equations without common base exponent
 Or change base:  
 $$\log_b c = {{\log_a c} \over {\log_a b}}$$
 
-If $a<1, \quad \log_{b} a < 0$ (flip inequality operator)
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+If $a<1, \quad \log_{b} a < 0$ (flip inequality operator)
+
+## Exponential functions
+
+$e^x$ - natural exponential function
+
+
+$$\lim_{h \rightarrow 0} {{e^h-1} \over h}=1$$
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