Contoh notasi O besar: f
(
x
)


∈
O


(
g
(
x
)
)




{\displaystyle {\color {red}f(x)}\in O{\color {blue}(g(x))}} karena ada M
>
0


{\displaystyle M>0} (yakni, M
=
1


{\displaystyle M=1} ) dan x

0




{\displaystyle x_{0}} (yakni, x

0


=
5


{\displaystyle x_{0}=5} ) sehingga f
(
x
)


≤


M
g
(
x
)




{\displaystyle {\color {red}f(x)}\leq {\color {blue}Mg(x)}} dengan x
≥

x

0




{\displaystyle x\geq x_{0}} .