KoreanSAT / data /json /2023 /math_6.txt
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6. ν•¨μˆ˜ \( f(x) = 2x^3 - 9x^2 + ax + 5 \) λŠ” \( x=1 \) μ—μ„œ κ·ΉλŒ€μ΄κ³ , \( x=b \) μ—μ„œ κ·Ήμ†Œμ΄λ‹€. \( a + b \)의 값은? (단, \(a\), \(b\)λŠ” μƒμˆ˜μ΄λ‹€.) [3점]
\begin{itemize}
\item[1] 12
\item[2] 14
\item[3] 16
\item[4] 18
\item[5] 20
\end{itemize}