#1**+2 **

Hey Hev!

We can see this is an arithmetic sequence,

It is obvious because the formula in the summation notation gives us the formula, 3n - 1

We just need to find the sum of the 8 terms.

To find the sum of an arithmetic sequence, we use the formula:

\(S_n=\frac{n}2(a_1+a_n)\), where \(S_n\) is the sum, n is the number of terms, a_{1} is the first term, and a_{n}_{ }is the last term.

We plug in the values of n into the formula, to find the term value.

\(S_n=\frac82(2+23)=100\), that is your final answer.

I hope this helped,

Gavin

GYanggg
May 16, 2018