Question

What is the 30th term of the arithmetic series 2, 5, 8, ...?

Answer 1

hi..

solution;-
a= 2, d= 3 n = 30

Sn = a+(n-1)d

= 2+ (30-1)×3
2+ 29×3

= 87+2 = 89ans

Answer 2

Common difference =5-2 =3

First term =2

Now,

30th term =a+29d

a+29d =30th term

2+[29*3] =30th term

2+87=30 th term

89 =30th term

I hope this will help you

-by ABHAY