Question

What is the sum of the first 6 terms of the sequence defined by an = 3n - 2?

Answer 1

51

Explanation:

when n=1

t 1=1

when n=2

t2=4

as first term is 1 and second term is 4 so the common difference is 3 ,for 6 term if you put this in formula for sum to the n term you will get 51

t1 =1

d=3

n=6

than S6=51