2x^2 -6x-8 what is the domain of this function

Answer 1

There is no real value of x for which f(x) is not defined. Therefore the Domain is the set of real numbers. You can even check by using your Ti-84 calculator and see the tables. No x value gives an "error" message in the y column. Additionally, if you look at the graph, the function is defined for all x from negative infinity to positive infinity.

Answer 2

Hi Aanuoluapo F.,

pretty much anything numerical you want it to be -- integers, real numbers, complex numbers .... Do you know some additional categories you'd like to add?

The RANGE, now -- that's a different matter, and it may be limited depending on what domain you choose. Since you're dealing with a parabolic function, in that case.

-- Cheers, --Mr. d.