Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
katiebugg
Group Title
The first term of an arithmetic series is 5 and the 22nd term is 68. Find the sum of the series
 2 years ago
 2 years ago
katiebugg Group Title
The first term of an arithmetic series is 5 and the 22nd term is 68. Find the sum of the series
 2 years ago
 2 years ago

This Question is Closed

Yahoo! Group TitleBest ResponseYou've already chosen the best response.0
an = a + (n1)d use this
 2 years ago

Yahoo! Group TitleBest ResponseYou've already chosen the best response.0
find a and d?
 2 years ago

best.shakir Group TitleBest ResponseYou've already chosen the best response.0
The first term of an arithmetic series is 5 and the 22nd term is 68. Find the sum of the series. The 22nd term (68) is the sum of the first term (5) and 21 times the common difference, d. This gives us an equation to solve for d: 5 + 21d = 68 21d = 63 d = 3 Judging by the content of these questions, you should have been given a formula for the sum of n terms of a series with first term a and common difference d. It's an + dn(n1)/2 (although you might have a slightly differentlooking formula or one with different variables). Using known values a=5, n=22, d=3 we can find the sum 5*22 + 3*22*21/2 = 110 + 33*21 = 110 + 693 = 803
 2 years ago

best.shakir Group TitleBest ResponseYou've already chosen the best response.0
@katiebugg did u get it?
 2 years ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.