📅 NSB 2021🎓 HS🔄 Round 5#️⃣ Q17🌟 BONUS✍️ Short Answer
A twice-differentiable function f of x on the real numbers has a negative second derivative for all x, and its graph contains the two points (2, 4) and (5, 9). What is the maximum possible integer value of f of 11?
✔️Answer:18
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