в АРИФМЕТИЧЕСКОЙ прогрессии а2=5, а4=9. Найдите а8
a3=a2+a4/2=7
d=a3-a2=7-5=2
a8=a4+4d=9+4*2=17
Copyright © 2025 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
a3=a2+a4/2=7
d=a3-a2=7-5=2
a8=a4+4d=9+4*2=17