Compute the domain of the function

Question

Compute the domain of the function f(x)= ax−15 in terms of a. Assume a>0. Answer with an interval, i.e. [0, infinity), or unions of intervals, i.e. (-infinity,1]U(6,9), or answer simply with an inequality, i.e. x<=-10.

Answer 1

The domain of the function you have submitted is the whole real line (-∞,∞) and it is independent of a.

ax - 15 is continuous on the whole real line.

 

If perchance you meant ax^-15, the answer is the whole real line except for x = 0.