Four Fours/Lemmata/Two Fours/2

Puzzle

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

Solutions

Solution $1$

$2 = 4 - \sqrt 4$

Solution $2$

$2 = \dfrac 4 {\sqrt 4}$

Solution $3$

$2 = \sqrt {\sqrt 4 + \sqrt 4}$

Solution $4$

$2 = \map \Gamma {\sqrt {\dfrac 4 {. \dot 4} } }$

Also see

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