find the domain of the function

[wildbill]

domain of the function.

f(x) = square root of 2 - x

sorry I am new and I don't knwo how to design the square root thing. Anyways, would this be right (-∞, 2) u (2, ∞) I am kinda lost when it comes to functions, but I tried.

 

[pka]

The domain of \(\displaystyle \L
\sqrt {2 - x}\) is \(\displaystyle \L
( - \infty ,2]\)