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Life
Group Title
Write each arithmetic series as the sum of terms, find each sum.
 one year ago
 one year ago
Life Group Title
Write each arithmetic series as the sum of terms, find each sum.
 one year ago
 one year ago

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Life Group TitleBest ResponseYou've already chosen the best response.0
dw:1354173691072:dw
 one year ago

Life Group TitleBest ResponseYou've already chosen the best response.0
this one's different
 one year ago

Life Group TitleBest ResponseYou've already chosen the best response.0
how do i find a_1
 one year ago

sagarrobo Group TitleBest ResponseYou've already chosen the best response.0
dw:1354173877445:dw put k=10 and get answer
 one year ago

sagarrobo Group TitleBest ResponseYou've already chosen the best response.0
answer=1000275=725
 one year ago

Life Group TitleBest ResponseYou've already chosen the best response.0
does a_1 =5 ?
 one year ago

geoffb Group TitleBest ResponseYou've already chosen the best response.1
\(a_1\) is the result of the equation when you plug your first term into it. Your equation is \(1005k\). The series starts when k = 1, so plug 1 in for k and solve. That's \(a_1\).
 one year ago

sagarrobo Group TitleBest ResponseYou've already chosen the best response.0
1005k is general term for k series so first term=95
 one year ago

Life Group TitleBest ResponseYou've already chosen the best response.0
what about a_n, dw:1354174176642:dw
 one year ago

Life Group TitleBest ResponseYou've already chosen the best response.0
its wrong i know...
 one year ago

sagarrobo Group TitleBest ResponseYou've already chosen the best response.0
its wrong refer to my solution above in figure
 one year ago

geoffb Group TitleBest ResponseYou've already chosen the best response.1
@Life: You need to distinguish between the formula for the sum of the series and the equation you're given (in this case, 1005k). You need to find the value for \(a_{10}\), and then plug that into your series summation formula.
 one year ago

geoffb Group TitleBest ResponseYou've already chosen the best response.1
\(a_1 = 95\) (you solved that already). \(a_{n} = a_{10} = 1005(10)\) Plug \(a_{1}\), \(a_{10}\) (which is the *value* you get—*not* 10), and \(n\) into your \(S_{n}\) formula and solve.
 one year ago

Life Group TitleBest ResponseYou've already chosen the best response.0
i dont understand how "I" got 95, i never did, but i undetstand everything after that, i thought a1=5
 one year ago

geoffb Group TitleBest ResponseYou've already chosen the best response.1
Your equation is \(1005k\), so \(a_{1}\) will be the result you get when you plug 1 in for \(k\).
 one year ago

geoffb Group TitleBest ResponseYou've already chosen the best response.1
\(a_{2}\) will be the result you get when you plug in 2 for \(k\). \(a_{3}\) will be the result you get when you plug in 3 for \(k\). ... \(a_{10}\) will be the result you get when you plug in 10 for \(k\).
 one year ago

geoffb Group TitleBest ResponseYou've already chosen the best response.1
@Life: Have you ever done computer programming? If so, do you know what a for loop is?
 one year ago

geoffb Group TitleBest ResponseYou've already chosen the best response.1
That's all a series is. For each value from what's below sigma to what's above it (in this case, between k=1 and k=10), perform the equation. Once you know each one, add them all together.
 one year ago

Life Group TitleBest ResponseYou've already chosen the best response.0
my final answer, s10=725, AM I RIGHT? :)
 one year ago

Life Group TitleBest ResponseYou've already chosen the best response.0
sorry for being dumb lol, i understand it now though, so it was all worth it
 one year ago

geoffb Group TitleBest ResponseYou've already chosen the best response.1
You're not being dumb. You are showing effort (not just "what's the answer?"), which is appreciated. :)
 one year ago

geoffb Group TitleBest ResponseYou've already chosen the best response.1
Good luck with the rest of them. I have faith that you'll get them all. Good night. :)
 one year ago

Life Group TitleBest ResponseYou've already chosen the best response.0
Good night :D
 one year ago

Life Group TitleBest ResponseYou've already chosen the best response.0
I really do appreciate you sticking with me until i understood it. It was probably a good half an hour before I finally understood it, so thanks a bunch
 one year ago
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