Find the sum of the arithetic series. ∑i=1102i

Step1
Asithmetic Progression
a=fisst team
b=common dijjuonu
n=jos $n^{th}$ number of team
$a_n=n^{th}$ team
${\displaystyle a_n=at(n-1)d}$
S=Sum of jist n team 5
${\displaystyle S=\frac{n}{2}(2a+(n-1)d)}$
Step2
as putting i from 1 to 10 we get series as
${\displaystyle 2,4,6,8,10,12,14,16,18,20}$
${\displaystyle a=2}$
${\displaystyle b=2}$
${\displaystyle n=10}$
${\displaystyle S=\frac{10}{2}\times (2\times 2+(10-1)\times 2)}$
${\displaystyle S=5\times (4+9\times 2)}$
${\displaystyle S=5\times 22}$
${\displaystyle S=110}$