Algebra-1

Question Analysis
This question tests the understanding of the domain of a piecewise function, which is the union of the domains of its individual pieces.

Key Concept Explanation
The domain of a piecewise function is the set of all possible input values (x-values) for which the function is defined. For this function, both pieces are defined for all real numbers.

Step-by-step Solution
1. Identify the domain of the first piece: is defined for .
2. Identify the domain of the second piece: is defined for .
3. Combine the domains: The union of