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

माना \(f: R \rightarrow R\) एक फलन है, जो \(f(x)=\frac{2 e^{2 x}}{e^{2 x}+e}\) तब \(f\left(\frac{1}{100}\right)+f\left(\frac{2}{100}\right)+f\left(\frac{3}{100}\right)+\ldots . .+f\left(\frac{99}{100}\right)\) बराबर होगा।

  1. A \(98\)
  2. B \(99\)
  3. C \(100\)
  4. D \(101\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(99\)

Step-by-step Solution

Detailed explanation

\(f(x)+f(1-x)=\frac{2 e^{2 x}}{e^{2 x}+e}+\frac{2 e^{2-2 x}}{e^{2-e x}+e}=\left[\frac{e^{2 x}}{e^{2 x}+e}+\frac{e^{2}}{e^{2}+e^{2 x+1}}\right]\) \(=2\left[\frac{e^{2 x-1}}{e^{2 x-1}+1}+\frac{1}{1+e^{2 x-1}}\right]=2\)…
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