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anonymous
 one year ago
PLEASE HELP! WILL MEDAL! Find the sum of the series.
anonymous
 one year ago
PLEASE HELP! WILL MEDAL! Find the sum of the series.

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[\sum_{n=1}^{15} (2n+1)\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0there are a couple ways to do this

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Okay I need the simplest way because I'm not good with this.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok lets find the first term, which means replace \(n\) by \(1\) what do you get?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0if that is confusing too, let me know and i will show you lol no not "3?" just "3"

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I know it is just 3 I was asking if 3 was right.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yeah \(2\times 1+1=3\) ok now the top number is 15 so lets find the 15th term replace \(n\) by \(15\) and see what you get

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok good now there are 15 terms all together one formula you can use is \[\huge \frac{n}{2}\left(a_1+a_n\right )\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0you computed \(a_1=3,a_{15}=31\) and in this case \(n=15\)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so do this \[\frac{15}{2}(3+31)\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0add first, divide by 2 then multiply by 15

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I meant 34 my number buttons are acting up and no. I was just stating the equation.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok so now divide 34 by 2 then multiply the result by 15

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0sound bingo yes good work

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Thank you for your help!
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