My question:
What possible values of $a$ lead to the inequality $|f(x_1) - f(x_2)| \gt |g(x_1) - g(x_2)|$.
I don't understand why I get voted down and there are even people suggesting that it should be closed. I stated my question and provided my attempt and where I got stuck. I guess it's because my question is too simple. But I really don't know how to solve that problem! Why should my question get down voted?