Question

n

th term of a AP is an=3n-1 then value of S2 is

a)2 b)7 c)9 d)5​

Answer 1

Step-by-step explanation:

a1 = 3(1)-1= 3-1= 2

a2 = 3(2)-1 = 6-1 = 5

sum of 2 terms = 2+5= 7

so, S2 is 7