Four Fours/Lemmata/Two Fours/9/Solutions

Puzzle: Two Fours: $9$

Using exactly $2$ instances of the number $4$, the task is to write an expression for $9$, using whatever arithmetical operations you consider necessary.

Solutions

Solution $1$

$9 = \dfrac 4 {. \dot 4}$

Solution $2$

$9 = \dfrac {\map \Gamma 4} {\sqrt {. \dot 4} }$