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

माना फलन \(f : R \rightarrow R\) इस प्रकार है कि \(f ( x )= x ^{3}+ x ^{2} f ^{\prime}(1)+ xf ^{\prime \prime}(2)+ f ^{\prime \prime \prime}(3), x \in R\) तो \(f(2)\) बराबर है

  1. A \(-4\)
  2. B \(30\)
  3. C \(-2\)
  4. D \(8\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(-2\)

Step-by-step Solution

Detailed explanation

\(f\left( x \right){x^3} + a{x^2} + bx + c\) \(f'\left( x \right) = 3{x^2} + 2ax + b \Rightarrow c = 6\) \(f''\left( x \right) = 6x + 2a\) \(f'''\left( x \right) = 6\,\,a = f'\left( 1 \right) = 3 + 2a + b\,\,\,\,\, \Rightarrow a + b = - 3\)…
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