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

माना फलन \(\mathrm{f}: \mathrm{R}-\{0,1\} \rightarrow \mathrm{R}\) इस प्रकार है कि \(\mathrm{f}(\mathrm{x})+\mathrm{f}\left(\frac{1}{1-\mathrm{x}}\right)=1+\mathrm{x}\) है। तो \(\mathrm{f}(\)2\()\) बराबर है-

  1. A \(\frac{9}{2}\)
  2. B \(\frac{9}{4}\)
  3. C \(\frac{7}{4}\)
  4. D \(\frac{7}{3}\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(\frac{9}{4}\)

Step-by-step Solution

Detailed explanation

\(f ( x )+ f \left(\frac{1}{1- x }\right)=1+ x\) \(x =2 \Rightarrow f (2)+ f (-1)=3\) \(x =-1 \Rightarrow f (-1)+ f \left(\frac{1}{2}\right)=0\) \(x =\frac{1}{2} \Rightarrow f \left(\frac{1}{2}\right)+ f (2)=\frac{3}{2}\) \((1)+(3)-(2) \Rightarrow 2 f (2)=\frac{9}{2}\)…
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