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Question Number 185793 by Rupesh123 last updated on 27/Jan/23

Answered by cortano1 last updated on 28/Jan/23

$$\frac{2}{x+1}=\frac{1}{5}\Rightarrow x=9$$$$f\left(\frac{1}{5}\right)=9^2-1=80$$

Answered by CElcedricjunior last updated on 27/Jan/23

$$\mathit{f}\left(\frac{2}{\mathit{x}+1}\right)={\mathit{x}}^2-1$$$$\mathit{f}\left(\frac{2}{9+1}\right)=9^2-1=>\mathit{f}\left(\frac{2}{10}\right)=81-1$$$$=>\mathit{f}\left(\frac{1}{5}\right)=80$$$$====================$$$$..................cedricjunior..............$$

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