fun-lim

Question: If $f(x)=\frac{\alpha \,x}{x+1},\ x\ne -1$. Then, for what value of $\alpha $ is $f(f(x))=x$



1) $\sqrt{2}$
2) $-\sqrt{2}$
3) 1
4) –1
Solution: Explanation: No Explanation
Functions

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