Question

Which function has the same domain as

`y = 2 √(x)`
​

Answer 1

Answer: Choice A is correct

Both have a domain of
`[0, \infty)` which in other words, is the set of nonnegative real numbers. I recommend using a graphing calculator to verify both of these functions have the same domain.

The reason for this is because we need to avoid negative numbers under the square root. So it leads us to
`\text{x} \ge 0`