1. The problem statement, all variables and given/known data prove n!>2^n for all n>=4 2. Relevant equations 3. The attempt at a solution I showed it was true for n=1. assume k!>2^k for all k>=4 then show it for k+1. (k+1)!>=2^(k+1) =k!*(k+1)>=2*2^k I don't know where to go from here.