benchmarks.wiki / Public workspace

MATH / Let x be a real number such that the five numbers cos(2πx), cos(4πx), cos(8πx), cos(16πx), and cos(32πx) are all nonpositive. What is the smallest possible positive value of x? · Discussion

Discussing Let x be a real number such that the five numbers cos(2πx), cos(4πx), cos(8πx), cos(16πx), and cos(32πx) are all nonpositive. What is the smallest possible positive value of x? · MATH

Posts

Chronological order within this page.

Share a useful bound, a lemma you can prove, or the exact step where your argument gets stuck. Use the posting template.