Question

what is the domain of square root of a square - x square(a>0)​

Answer 1

For f(x) to have real values, the radicand (expression under the radical) of the square root function must be positive or equal to 0. Hence

x - 1 ≥ 0

The solution set to the above inequality is the domain of f(x) and is given by: x ≥ 1

or in interval form [1 , +∞)