Find the domain of the function f(x)=√(9-2x)/√x^2−9x+18.

Answer 1

Hi Sam T.,

It's difficult to be sure exactly what your function really was, since the "√" symbol was not delimited in its argument. Please bear this issue in mind when you submit text equivalents of math expressions to Wyzant! Assuming it was really (9-2x)^0.5/(x^2-9x+18)^0.5 , then you simply must make sure that both (9-2x) and (x^2-9x+18) are non-negative quantities, since .sqrt. does not accept negative arguments (unless your course deals with complex algebra, which I doubt?). Can you take it from there?

-- Cheers, -- Mr. d.