Prove that the sequence be defined by the recursive relationship,
converges and find the limit of the sequence.
Proof. First, we show that the sequence is monotonically decreasing for all . For the base case we have and
Hence, . Assume then that for all positive integers up to some we have . Then,
Thus, the sequences is monotonically decreasing. The sequence is certainly bounded below since all of the terms are greater than 0. Therefore, the sequence converges
To compute the limit of the sequence, assume the sequence converges to a finite limit (justified since we just proved that it does indeed converge). Therefore,