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

माना \(\sum\limits_{k = 1}^{10} {f\,(a\, + \,k)} \, = \,16\,({2^{10}}\, - \,1)\) है, जहाँ सभी प्राकृत संख्याओं \(x , y\)
के लिए, फलन \(f , f ( x + y )= f ( x ) f ( y )\) को संतुष्ट करता है तथा \(f ( a )=2\) है। तो प्राकृत संख्या \(^{\prime} a ^{\prime}\) बराबर है :

  1. A \(4\)
  2. B \(16\)
  3. C \(2\)
  4. D \(3\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(3\)

Step-by-step Solution

Detailed explanation

From the given functional equation: \(f\left( x \right) = {2^x}\forall x \in N\) \({2^{a + 1}} + {2^{a + 2}} + ... + {2^{a + 10}} = 16\left( {{2^{10}} - 1} \right)\) \({2^a}\left( {2 + {2^2} + ... + {2^{10}}} \right) = 16\left( {{2^{10}} - 1} \right)\)…
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