Have you at least done the calculations? if x> 0 then . If x< 0 then . And as long as a is not 0. Are the limit from above and below equal to 0?
What do I do here? I just did a proof that showed that f is bounded iff a => 1 + c (and I had a tough time with that). Can I use that result to show continuity whenever a > 1 + c, or is there more to it? And what to do about the "iff"?
Please, please, please be clear and explicit in your replies--I am still a rookie at this stuff.