Find the domain and the range of the real function f defined by `f(x)=sqrt((x-1))`.

Explanation

To find the domain and range of the function \( f(x) = \sqrt{x - 1} \), we will follow these steps:

### Step 1: Determine the Domain
The function \( f(x) \) involves a square root. For the square root to be defined in the real number system, the expression inside the square root must be non-negative. Therefore, we set up the inequality:

\[ x - 1 \geq 0 \]
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