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Solving these linear equations might not seem immediately straightforward. Still, to answer the question about \( f(2) \), one can substitute examples or solve these equations analytically. For instance, substituting \( a = 1/27 \), \( b = -1/9 \), \( c = 0 \):
\[ f(2) = \frac{8}{27} - \frac{4}{9} = \frac{8 - 12}{27} = \frac{-4}{27} \]

However, this methodology still needs more careful examination of the equations or concrete alternatives/test points. The exact \( p \) and \( q \) depend heavily on signed errors and the assumptions used. Therefore, more investigation or assumptions check is necessary, or computational tools might be needed to solve the cubic formula effectively. Lastly, \( p + q = 4 + 27 = 31 \).


ํ„ฐ๋ณด๋Š” -4/27์ด๊ณ  ์‹ค์ œ ํ’€์ด๋Š” 22/9