Answer:
Step-by-step explanation:
I assume you mean to ask how to find the sum of the seven terms?
You have



...

So the sum is

You know that

and

, so the sum is equal to
Pretty sure x=-24.5 did the math. Check my answer before you submit anything
Step-by-step explanation:
was wondering what you are looking to get out for a party for a party this week to take care if there are a little bit of the developments in your response and if they have to go because of what you want me and my parents think about to leave you and and then you