showing it is increasing with an upper bound or decreasing
with a lower bound
if an >an+1 its underbound
an< an+1 then its upperbound
The Attempt at a Solution
I tried first by finding out the sequence:
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?