Which of the following is an example of a function with a domain (-infty,+infity) and
a range (-infity, infity) ?
A. f(x) = (2x)".5
B. f(x) = (2x).25
C. f(x) = (2x) 1/6
O D. f(x) = (2x)1/3

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.