4 Lonsider the functlan fx)= -5x4- |l+x?tx-17. functfon Fex)= -5xH-|l+x²+2x-17. 5xH-113+ Whatis r n such thut fnl= ö for all x? the simallest number Such that [in) %3D fon) is the n-th derivallve if f.

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