A community for students. Sign up today!
Here's the question you clicked on:
 0 viewing

This Question is Closed

RadEn
 2 years ago
Best ResponseYou've already chosen the best response.1it similar by : 3(1) + 3(2) + 3(3) + 3(4) + ... + 3(10) = 3(1+2+3+4+...+10) = ......

Life
 2 years ago
Best ResponseYou've already chosen the best response.0so im wrong, i thought you were supposed to use the formula, Sn=n(a1+an)/2

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.1That wording is a bit interesting. Are there multiple questions like this to find the answer for, or just this one?

Life
 2 years ago
Best ResponseYou've already chosen the best response.0yea there are about 8 questions that are under that two part question

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.1Your formula would work; you must have done it wrong.

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.1\[S_{n} = \frac{n}{2} (a_{1} + a_{n})\] Did you use 10 for \(n\) and 3 for \(a_{1}\)?

RadEn
 2 years ago
Best ResponseYou've already chosen the best response.1for : n=1 > 3(1) = 3 n=2 > 3(2) = 6 n=3 > 3(3) = 9 .... so on, the series be 3+6+9+....+30 yes, use the formula like @geoffb said :)

Life
 2 years ago
Best ResponseYou've already chosen the best response.0for n, i put 10, a1, i put 1, and for A n, i put 3

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.1Okay, that's the problem. \(a_{1}\) means the value of your first term (which is 3 times 1, or 3). \(a_{n}\) means the value of your nth term. In this case, n is 10, so the value of the 10th term is 3 times 10, or 30.

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.1No. What is your calculation?

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.1Why are you using 10 for \(a_{n}\)?

geoffb
 2 years ago
Best ResponseYou've already chosen the best response.1It wants \(a_{n}\), not \(n\).
Ask your own question
Ask a QuestionFind more explanations on OpenStudy
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.