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JEE Mains · Maths · STD 12 - 1. relation and function

माना \(f(x)\) एक द्विघाती बहुपद है जिसका मुख्य-गुणांक 1 है तथा \(f (0)= p , p \neq 0\) और \(f (1)=\frac{1}{3}\) हैं। यदि समीकरणों \(f ( x )=0\) तथा \(fofofof (x)=0\) का एक उभयनिष्ठ वास्तविक मूल है, तो \(f(-3)\) बराबर है

  1. A \(25\)
  2. B \(24\)
  3. C \(23\)
  4. D \(22\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(25\)

Step-by-step Solution

Detailed explanation

Let \(f(x)=(x-\alpha)(x-\beta)\) It is given that \(f(0)=p \Rightarrow \alpha \beta=p\) and \(f(1)=\frac{1}{3} \Rightarrow(1-\alpha)(1-\beta)=\frac{1}{3}\) Now, let us assume that \(\alpha\) is the common root of \(f(x)=0\) and \(f \circ f \circ f o f(x)=0\) \(fofofof(x)=0\)…
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