Question Number 863 by 123456 last updated on 30/Mar/15
![f(xy)=f[xf(y)] f(x)=?](https://www.tinkutara.com/question/Q863.png)
$${f}\left({xy}\right)={f}\left[{xf}\left({y}\right)\right] \\ $$$${f}\left({x}\right)=? \\ $$
Answered by prakash jain last updated on 30/Mar/15
$${f}\left({y}\right)={y} \\ $$
Commented by prakash jain last updated on 30/Mar/15
$${f}\left({y}\right)={c} \\ $$$${f}\left({y}\right)=\mid{y}\mid\:\mathrm{are}\:\mathrm{also}\:\mathrm{solutions}. \\ $$