Four Fours/Lemmata/Three Fours/17/Solutions

Puzzle: Three Fours: $17$

Using exactly $3$ instances of the number $4$, the task is to write an expression for $17$, using whatever arithmetical operations you consider necessary.

Solutions

Solution $1$

$17 = \dfrac {\map \Gamma 4} {.4} + \sqrt 4$