KoreanSAT / data /json /2025 /math_13.txt
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13. ์ตœ๊ณ ์ฐจํ•ญ์˜ ๊ณ„์ˆ˜๊ฐ€ $1$์ธ ์‚ผ์ฐจํ•จ์ˆ˜ $f(x)$๊ฐ€
\[
f(1) = f(2) = 0, \quad f'(0) = -7
\]
์„ ๋งŒ์กฑ์‹œํ‚จ๋‹ค. ์›์  $\mathrm{O}$์™€ ์  $\mathrm{P}(3, f(3))$์— ๋Œ€ํ•˜์—ฌ ์„ ๋ถ„ $\mathrm{OP}$๊ฐ€ ๊ณก์„  $y = f(x)$์™€ ๋งŒ๋‚˜๋Š” ์  ์ค‘ $\mathrm{P}$๊ฐ€ ์•„๋‹Œ ์ ์„ $\mathrm{Q}$๋ผ ํ•˜์ž.
๊ณก์„  $y = f(x)$์™€ $y$์ถ• ๋ฐ ์„ ๋ถ„ $\mathrm{OQ}$๋กœ ๋‘˜๋Ÿฌ์‹ธ์ธ ๋ถ€๋ถ„์˜ ๋„“์ด๋ฅผ $A$,
๊ณก์„  $y = f(x)$์™€ ์„ ๋ถ„ $\mathrm{PQ}$๋กœ ๋‘˜๋Ÿฌ์‹ธ์ธ ๋ถ€๋ถ„์˜ ๋„“์ด๋ฅผ $B$๋ผ ํ•  ๋•Œ,
$B - A$์˜ ๊ฐ’์€? \hfill [4์ ]
\begin{itemize}
\item[1] $\frac{37}{4}$
\item[2] $\frac{39}{4}$
\item[3] $\frac{41}{4}$
\item[4] $\frac{43}{4}$
\item[5] $\frac{45}{4}$
\end{itemize}