Algebra-1

Question Analysis
This question tests the student's ability to express the domain of a function in set notation.

Key Concept Explanation
The domain of the function is the set of all non-negative real numbers because the square root of a negative number is not defined in the set of real numbers.

Step-by-step Solution
1. Identify the condition that must be satisfied for in the function .
2. Recognize that must be non-negative, i.e.,

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