What is the sum of all real numbers x that are not in the domain of the function f(x) = 1/(x^2 - 7) + 1/(x^4 - 8) + 1/(x^5 - 9)?
any 'x' that causes a denominator to be = 0 is not in the domain
Solve the following x^2 -7 = 0
x^4 -8 = 0
x^5 -9 = 0 to find the x's to add together for the answer
