📝 Absolute Extrema

Q1. Find the absolute maximum and minimum of \(f(x)=x^{2}-4x\) on the interval \([0,5]\).

💡 Difficulty: easy | ✅ Correct: C

Q2. A company’s weekly production cost (in thousands of dollars) is \(C(x)=0.02x^{2}-0.3x+20\), where \(x\) is the number of thousands of boxes produced. What production level minimizes cost?

💡 Difficulty: medium | ✅ Correct: A

Q3. Consider \(h(x)=\frac{x}{x^{2}+1}\) on \(\mathbb{R}\). Which of the following gives the absolute maximum value?

💡 Difficulty: hard | ✅ Correct: B