# Epsilons and Deltas:: Book Error? Or My Error?

 P: 3,015 1. The problem statement, all variables and given/known data Given f(x) = mx + b, m > 0, L = (m/2) + b, xo = 1/2 , $\epsilon = c >0$ find (a) an open interval on which the inequality |f(x) - L| < $\epsilon$ holds. Then find (b) $\delta$ such that 0 < |x - xo| < $\delta\Rightarrow$ |f(x) - L| < $\epsilon$ Here is my problem with the book's solution. Since the condition $\epsilon=c>0$ was given, I only used the right-hand-side of the inequality: [itex]-c<|f(x)-L| 0 ?