Find the sum of the first 8 terms of the sequence. Show all work for full credit.1, -3, -7, -11, ...
Mathematics · High School · Sun Jan 24 2021
Answered on
Given the sequence:
1, -3, -7, -11, …
Determine the sum of the first 8 terms.
Solution:
The given can be solved using logical analysis, list first all the terms, then add.
1st term = 1
2nd term = -3
3rd term = -7
4th term = -11
To ger the succeeding terms, we subtract -4.
5th term = -15
6th term = -19
7th term = -23
8th term = -27
Add all the values.
= 1 - 3 - 7 - 11 - 15 - 19 - 23 - 27
= -104
Final answer:
= -104