1. The problem statement, all variables and given/known data showing it is increasing with an upper bound or decreasing with a lower bound n/(2^n) 2. Relevant equations if an >an+1 its underbound an< an+1 then its upperbound 3. The attempt at a solution I tried first by finding out the sequence: a1=1/2 a2=1/2 a3=3/8 a4=1/4 a5=5/32 I'm assuming its decreasing, but I'm not sure if this is monotonic at all. Considering how a1=a2 and then a2>a3 and a3>a4 then a4>a5. I think it's underbound since an>an+1 but the first part threw me off since a1=a2. Someone clarify for me?