+---
+geometry: margin=2cm
+<!-- columns: 2 -->
+graphics: yes
+tables: yes
+author: Andrew Lorimer
+classoption: twocolumn
+header-includes: \pagenumbering{gobble}
+---
+
+# random methods shit
+
+## Index laws
+
+$a^m \times a^n = a^{m+n}$
+$a^m \div a^n = a^{m-n}4$
+$(a^m)^n = a^{_mn}$
+$(ab)^m = a^m b^m$
+${({a \over b})}^m = {a^m \over b^m}$
+
+## Fractional indices
+
+$^n\sqrt{x}=x^{1/n}$
+
+## Logarithms
+
+$$\log_b (x) = n \quad \operatorname{where} \hspace{0.5em} b^n=x$$
+
+## Using logs to solve index eq's
+
+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)
\ No newline at end of file