menu
Qamnty
Login
Register
My account
Edit my Profile
Private messages
My favorites
Find the sum of the arithmetic series for which a_1 = 7, n = 31, and a_n = 127.
Ask a Question
Questions
Unanswered
Tags
Ask a Question
Find the sum of the arithmetic series for which a_1 = 7, n = 31, and a_n = 127.
asked
Nov 14, 2021
175k
views
0
votes
Find the sum of the arithmetic series for which a_1 = 7, n = 31, and a_n = 127.
Mathematics
high-school
Fouad Boukredine
asked
by
Fouad Boukredine
8.6k
points
answer
comment
share this
share
0 Comments
Please
log in
or
register
to add a comment.
Please
log in
or
register
to answer this question.
1
Answer
5
votes
Answer: 2077
There are 31 terms.
S₃₁ = 31(a₁+a₃₁)/2 = 31(7+127)/2 = 2077
Stanleyrr
answered
Nov 18, 2021
by
Stanleyrr
8.4k
points
ask related question
comment
share this
0 Comments
Please
log in
or
register
to add a comment.
← Prev Question
Next Question →
Related questions
asked
Jul 8, 2024
234k
views
An arithmetic sequence has the recursive formula (a_n = a_n-1 - 4) with (a_1 = 5). What is the explicit formula for this sequence? A. (a_n = 5 + (n-1)(-4)) B. (a_n = 5 + (n-4)(-1)) C. (a_n = (-1) + (n
Slashroot
asked
Jul 8, 2024
by
Slashroot
8.8k
points
Mathematics
high-school
1
answer
2
votes
234k
views
asked
Oct 28, 2024
73.3k
views
The arithmetic sequence a_n is defined below. Find the first five terms of the sequence. a_1 = −6, d=8. Which of the following represents the correct first five terms of the sequence? a) -6, 2, 10, 18,
Null Head
asked
Oct 28, 2024
by
Null Head
7.6k
points
Mathematics
high-school
1
answer
4
votes
73.3k
views
asked
Aug 13, 2024
65.8k
views
Find any of the values a_1, d, a_n, n, or S_n that are missing from the arithmetic sequence 5,12,19, …, 68 The value of a_1 is __
Alan Kis
asked
Aug 13, 2024
by
Alan Kis
7.6k
points
Mathematics
high-school
1
answer
5
votes
65.8k
views
Ask a Question
Welcome to Qamnty — a place to ask, share, and grow together. Join our community and get real answers from real people.
Categories
All categories
Mathematics
(3.7m)
History
(955k)
English
(903k)
Biology
(716k)
Chemistry
(440k)
Physics
(405k)
Social Studies
(564k)
Advanced Placement
(27.5k)
SAT
(19.1k)
Geography
(146k)
Health
(283k)
Arts
(107k)
Business
(468k)
Computers & Tech
(195k)
French
(33.9k)
German
(4.9k)
Spanish
(174k)
Medicine
(125k)
Law
(53.4k)
Engineering
(74.2k)
Other Questions
How do you can you solve this problem 37 + y = 87; y =
What is .725 as a fraction
How do you estimate of 4 5/8 X 1/3
Twitter
WhatsApp
Facebook
Reddit
LinkedIn
Email
Link Copied!
Copy
Search Qamnty