f(x) ‘??????’? ‘????’ ??, ‘??? ??’

??? f(x)(????)? ???? ?? ??? ???.

f(x)? 25? ?? ??? ????? ??? '??????'?? ?? 2? ?? '?? ???'? ???? '? ???' ??? ????.

?? ??? ???? ??? ?? ??? ?? ??? ??? f(x)? ???? ???? ??? ??? '? ???'? ????? ????.

f(x)? '? ???'? ???? ??? ?? ??? ??? ??? ??? ???? '???'? ??? ??? ??? ???? ??? ??? ???.

??? ? ????? "f(x) '??????' ??, ???? ????", "f(x) '??????' ??, ??? ????", "f(x) '??????' ??, ? ??? ? ??", "f(x) '??????' ??, ?? ??? ??? ? ???" ?? ??? ???.

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