\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
Consider the inequality \(\frac{x-4}{2x+1} \ge 1\).
  1. Rewrite the inequality in the form \(f(x) \ge 0\), where \(f(x)\) is a single rational expression.
  2. Find the critical values for the inequality.
  3. Hence, solve the inequality \(\frac{x-4}{2x+1} \ge 1\).

Capture an image of your work. AI teacher feedback takes approximately 10 seconds.