SOLUTION: If f(x) = 2√x then what is the smallest number in the domain of the function f ?

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Question 307304: If f(x) = 2√x then what is the smallest number in the domain of the function f ?
Answer by nerdybill(7384) About Me  (Show Source):
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If f(x) = 2√x then what is the smallest number in the domain of the function f ?
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The smallest number is 0 (zero).
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Because if it goes below zero, it will become negative -- square root of a negative number is an "imaginary" number.