CUET · MATHS · PYQ PAPER 2023
If \(x\) is real, the minimum value of \(f(x)=x^2-8 x+20\) is :
- A 4
- B 1
- C 2
- D 3
Answer & Solution
Correct Answer
(A) 4
Step-by-step Solution
Detailed explanation
\(x = -\frac{b}{2a}\) \(x = -\frac{(-8)}{2(1)} = 4\) \(f(4) = (4)^2 - 8(4) + 20\) \(f(4) = 16 - 32 + 20 = 4\)
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