Find domain

Qno.2 and answer is [1,1]

@darkknight x1>=0 and x+1>=0
Note:
$\sqrt{ab}=\sqrt{a}\sqrt{b}$ holds true only when atleast one of a or b is non negative
Qno.2 and answer is [1,1]
@darkknight x1>=0 and x+1>=0
Note: