Задание
Выберите члены последовательности \(\displaystyle (x_n){\small ,}\)расположенные между \(\displaystyle x_{15}\)и \(\displaystyle x_{20}{\small .}\)
- \(\displaystyle x_{14}\)
- \(\displaystyle x_{19}\)
- \(\displaystyle x_{18}\)
- \(\displaystyle x_{15}\)
- \(\displaystyle x_{20}\)
- \(\displaystyle x_{16}\)
- \(\displaystyle x_{17}\)
- \(\displaystyle x_{21}\)