KoreanSAT / data /json /2025 /math_21.txt
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21. ν•¨μˆ˜ $f(x) = x^3 + ax^2 + bx + 4$κ°€ λ‹€μŒ 쑰건을 λ§Œμ‘±μ‹œν‚€λ„λ‘ ν•˜λŠ” 두 μ •μˆ˜ $a, b$에 λŒ€ν•˜μ—¬ $f(1)$의 μ΅œλŒ“κ°’μ„ κ΅¬ν•˜μ‹œμ˜€. [4점]
\[
\text{λͺ¨λ“  μ‹€μˆ˜ } \alpha \text{에 λŒ€ν•˜μ—¬ } \lim_{x \to \alpha} \frac{f(2x+1)}{f(x)} \text{의 값이 μ‘΄μž¬ν•œλ‹€.}
\]