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SMO 2009 Open Round 1 Question 5

SMO · SMO 2009 Open Round 1

Question 5

Let $f(x)=a_0+a_1x+a_2x^2+a_3x^3+a_4x^4+a_5x^5$ be a polynomial, with constant coefficients and $a_5=7$. When divided by $x-2004,x-2005,x-2006,x-2007,x-2008$, respectively, it leaves remainders $72,-30,32,-24,24$. Find $f(2009)$.