1.Relation and Function
hard

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-

A

$\frac{9}{2}$

B

$\frac{9}{4}$

C

$\frac{7}{4}$

D

$\frac{7}{3}$

(JEE MAIN-2023)

Solution

$f ( x )+ f \left(\frac{1}{1- x }\right)=1+ x$

$x =2 \Rightarrow f (2)+ f (-1)=3$

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

$x =\frac{1}{2} \Rightarrow f \left(\frac{1}{2}\right)+ f (2)=\frac{3}{2}$

$(1)+(3)-(2) \Rightarrow 2 f (2)=\frac{9}{2}$

$\therefore f (2)=\frac{9}{4}$

Standard 12
Mathematics

Similar Questions

Start a Free Trial Now

Confusing about what to choose? Our team will schedule a demo shortly.