Find the domain of each of the following real fuctions:
(i) `f(x)=sqrt(x-3)` (ii) `g(x)=sqrt(4-x^(2))` (iii) `h(x)=(1)/(sqrt(1-x))`.

Explanation

To find the domain of the given functions, we need to determine the set of all possible values of \( x \) for which each function is defined.

### (i) For \( f(x) = \sqrt{x - 3} \):

1. **Set the expression inside the square root greater than or equal to zero**:
\[ x - 3 \geq 0 \]
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