log_{a} \; x=\frac{log_{b} \; x}{log_{b} \; a}.

\int_{a}^{b}{ }f\left(  x \right) dx=F\left(  b \right) -F\left( a  \right),
 

\lim_{ x \to \infty }\left( 1+\frac{1}{n}  \right) ^n=e

σ=\sqrt{\frac{\sum_{i=1}^{n}{ } \left(  x_{i}-\overline{x} \right)^2 }{n}}.

Logaritmi valem:

Newtoni-Leibnizi valem:

Arve e valem:

Standardhälve:

a = true
b = true
c = true
d = true