Question

Give and example of a radical function f(x) that goes through the point (2,4) and whose domain and range are both (-infinity, infinity). I just need the function, no graph needed.

Answer 1

First, what does "radical function" mean to you? Give an example.

Answer 2

y=- srqrt (3x-2)?

Answer 3

Yes. You'll find that this function is not even, however, so the domain does not stretch from minus infinity to pos. inf.
Can you think of a different, even, function, to type under the radical sign?