Recall that the square root of y is defined for all
[tex]y\ge0.[/tex]Now, we know that
[tex]|x|\ge0,[/tex]for all x in the real numbers.
Then:
[tex]|x|+1>0.[/tex]Therefore, the expression makes sense for all x in the real numbers.
Answer:
[tex]\R\text{.}[/tex]