MCQ Practice Mathematics 📖 যদি f(x) = (3x + 1)/(3x - 1) হয়, তাহলে {f(x) + 1}/{f((x) - 1} এর মান কত? A 3x B 4x C 6x D 9x Favorite Practice Add to Book Explanation & Answer Detailed explanations and answers are restricted. Unlock full access by logging in to your account. 🔒 Unlock the detailed explanation and answers Log In / Sign Up