Bạn đang ở: / / (HK1 Toán 12) Cho \({{\log }_{2}}\left( {{\log }_{3}}\left( {{\log }_{4}}x \right) \right)={{\log }_{3}}\left( {{\log }_{4}}\left( {{\log }_{2}}y \right) \right)\) \(={{\log }_{4}}\left( {{\log }_{2}}\left( {{\log }_{3}}z \right) \right)=0\). Hãy tính \(S=x+y+z\)