1. You need to multiply the denominator by something that will make the content of the radical be a square—so that when you take the square root, you get something rational. Easiest and best is to multiply by √6. Of course, you must multiply the numerator by the same thing. Then simplify.

2. Identify the squares under the radical and remove them.

The domain of F(x) is all real numbers.
This is due to the fact that the function has no undefined points or domain constraints.
The hundred thousand place is the number that is 6 times to the right of the decimal:
In this case that number is 2