Four Fours/Lemmata/Three Fours/4

Puzzle

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

Solutions

Solution $1$

$4 = 4 + 4 - 4$

Solution $2$

$4 = \dfrac {\sqrt 4 - .4} {.4}$

Solution $3$

$4 = \sqrt [4] {4^4}$

Also see

Previous  ... Next