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JEE Mains · Maths · STD 12 - 5. continuity and differentiation

माना \(f\) एक अवकलनीय फलन इस प्रकार है कि \(f(1)=2\) तथा सभी \(x \in R\) के लिये \(f^{\prime}( x )=f( x )\) है। यदि \(h(x)=f(f(x))\) हो, तो \(h^{\prime}(1)\) होगा 

  1. A \(2e^2\)
  2. B \(4e\)
  3. C \(2e\)
  4. D \(4e^2\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(4e\)

Step-by-step Solution

Detailed explanation

\(\frac{{f'\left( x \right)}}{{f\left( x \right)}} = 1\,\,\,\forall x \in R\) Integrate and use \(f\left( 1 \right) = 2\) \(f\left( x \right) = 2{e^{x - 1}} \Rightarrow f'\left( x \right) = 2{e^{x - 1}}\)…
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