=+ln(2n)

(2n)s ≤ ln(2n − 1)

(2n − 1)s + ln(2n)

(2n)s 2

ln(2n)

(2n)s ≥ ln(2n + 1)

(2n + 1)s + ln(2n)

(2n)s (15.11)

for appropriate values of n and s. Use these to prove that

∞