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Mathematics 19 Online
OpenStudy (christos):

So I got this problem. http://screencast.com/t/BYYo2dwwz Leave the part where it has to be a program. I Just can't understand what is asking me in mathematical terms. Can someone explain to me simply? I would really appreciate it. EDIT: Please try to explain it to me simply, I have absolutely no clue

OpenStudy (anonymous):

your given a series.

OpenStudy (anonymous):

\[S _{n}=n/2[2a+(n-1)d]\]

OpenStudy (anonymous):

where S_n is the sum of all terms

OpenStudy (christos):

that doesnt make it more simple to me

OpenStudy (anonymous):

r u familiar with that formula?

OpenStudy (raden):

use the " telescopic " series

OpenStudy (raden):

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