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f-n-x-f-n-1-x-f-n-1-x-f-1-x-x-2017-x-8-x-4-lim-n-f-n-x-




Question Number 19085 by 433 last updated on 04/Aug/17
f_n (x)=(√(f_(n−1) (x)×(f_(n−1) (x))′))  f_1 (x)=x^(2017) +x^8 +x^4   lim_(n→∞) f_n (x)=?
$$\mathrm{f}_{\mathrm{n}} \left(\mathrm{x}\right)=\sqrt{\mathrm{f}_{\mathrm{n}−\mathrm{1}} \left(\mathrm{x}\right)×\left(\mathrm{f}_{\mathrm{n}−\mathrm{1}} \left(\mathrm{x}\right)\right)'} \\ $$$$\mathrm{f}_{\mathrm{1}} \left(\mathrm{x}\right)=\mathrm{x}^{\mathrm{2017}} +\mathrm{x}^{\mathrm{8}} +\mathrm{x}^{\mathrm{4}} \\ $$$$\underset{\mathrm{n}\rightarrow\infty} {\mathrm{lim}f}_{\mathrm{n}} \left(\mathrm{x}\right)=? \\ $$

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