hello; I'm still having a lot of trouble with the following question; I really am unsure of how to start the problem let alone how to solve the

hello; I'm still having a lot of trouble with the following question; I really am unsure of how to start the problem let alone how to solve the problem:prove that a set S in a vector space V is linearly dependent if and only if there exists a proper subset S'of S with the same span as S (i.e.- such that span(S')=span(S))thank you for your help and considerationall the best