Groups and FieldsChallengeCosets and Lagrange's Theorem ShareCosets and Lagrange's Theorem · Challenge problemWhat is the smallest k≥1k\ge1k≥1 with ak≡1(mod35)a^k\equiv1\pmod{35}ak≡1(mod35) for EVERY aaa coprime to 353535?Check Show answer Walk through it step by step Practice more like this Review this concept