Question

find the sum of 10 terms of an AP 2, 6, 10,.......... ( sn= n/2 [ 2a+ n-1) d]formula​

Answer 1

S10=120

Step-by-step explanation:

a=2

d=6-2=4

S10=10/2(2*2+(10-1)4)

=5(4+36)

=5(40)

=120

Hope it helps :)