Groups and FieldsSuperchallengeCosets and Lagrange's Theorem ShareCosets and Lagrange's Theorem · Superchallenge problemHow many x∈U(105)x\in U(105)x∈U(105) satisfy x4≡1(mod105)x^4\equiv1\pmod{105}x4≡1(mod105)?Check Show answer Walk through it step by step Practice more like this Review this concept