yarawaneska49 23/04/2022 A1 = 55an = 295r = 5an = a1+(n-1).r295 = 55+(n-1).5295-55 = 5n-5240 = 5n-55n = 245n = 245/5n = 49Sn = (a1+an).n/2Sn = (55+295).49/2Sn = 350 . 49 / 2Sn = 175 . 49Sn = 8575
yarawaneska49
A1 = 55
an = 295
r = 5
an = a1+(n-1).r
295 = 55+(n-1).5
295-55 = 5n-5
240 = 5n-5
5n = 245
n = 245/5
n = 49
Sn = (a1+an).n/2
Sn = (55+295).49/2
Sn = 350 . 49 / 2
Sn = 175 . 49
Sn = 8575