Дана арифметическая прогрессия: \(\displaystyle 9, 13, 17, 21, …\)

Сравните \(\displaystyle (a_{13}+ a_{15})\) и \(\displaystyle 2a_{14}{\small .}\)

\(\displaystyle (a_{13} + a_{15})\) [?|<|>|=] \(\displaystyle 2a_{14}{\small .}\)