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- 14:08, 19 January 2012 (diff | hist) . . (+421) . . N 1971 Canadian MO Problems/Problem 5 (Created page with "<math>p(0)=a_nx^{n}+a_{n-1}x^{n-1}+...a_1x+a_0=a_0</math> We know that p(0) is odd, so we know <math>a_0</math> is odd. By Vieta's this means that all the roots of polynomial p...")