Teaching EMRS PGT Mock Test 2023 Mathematics Relations and Functions Domain of a Function

The domain of the function \({\rm{f}}\left( {\rm{x}} \right) = \frac{1}{{\sqrt {\left| {\rm{x}} \right| - {\rm{x}}} }}\) is

1
[0, ∞) 
2
(-∞, 0)
3
[1, ∞) 
4
(-∞, 0] 
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