1. The problem statement, all variables and given/known data Given that u , v and w are vectors, which of the following are well defined operations? Find ALL correct answers A. (3u X v) X (5u X w) B. (3u X v) X (5u . w) C. (3u X v) . (5u . w) D. (3u X v) . (5u X w) E. none of the above X = Cross Product . = Dot Product I'm just wondering what this question means by "Well Defined Operations". If anyone knows, can you help me out? Thanks.