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Is this answer correct? The answer I got was -4 is less than or equal to x

Is this answer correct? The answer I got was -4 is less than or equal to x-example-1
User Cyt
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It would be correct if it asked for the range, but it's asking for the domain (x values).

The domain of a function excludes imaginary numbers, and you get an imaginary number when x is negative (square root of negative number is imaginary). So x has to be greater than or equal to 0. That's the domain.
User Harshvardhan Joshi
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