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• 14:39, 17 February 2018 (diff | hist) . . (+323)‎ . . N 1969 IMO Problems/Problem 2 ‎ (Created page with "Let <math>a_1, a_2,\cdots, a_n</math> be real constants, <math>x</math> a real variable, and <cmath>f(x)=\cos(a_1+x)+\frac{1}{2}\cos(a_2+x)+\frac{1}{4}\cos(a_3+x)+\cdots+\frac...")
• 14:32, 17 February 2018 (diff | hist) . . (+292)‎ . . N 1967 IMO Problems/Problem 3 ‎ (Created page with "Let <math>k, m, n</math> be natural numbers such that <math>m+k+1</math> is a prime greater than <math>n+1.</math> Let <math>c_s=s(s+1).</math> Prove that the product <cmath>(...")

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