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f-f-x-f-x-2-




Question Number 391 by 123456 last updated on 25/Jan/15
f[f(x)]=f(x^2 )
$${f}\left[{f}\left({x}\right)\right]={f}\left({x}^{\mathrm{2}} \right) \\ $$
Answered by prakash jain last updated on 27/Dec/14
The equation above implies  f(x)=x^2
$$\mathrm{The}\:\mathrm{equation}\:\mathrm{above}\:\mathrm{implies} \\ $$$${f}\left({x}\right)={x}^{\mathrm{2}} \\ $$