ext_50268 ([identity profile] tancaliel.livejournal.com) wrote in [personal profile] nasasie 2003-06-08 01:40 pm (UTC)

Hee, I learned that in math too... Isn't Sn = ½ · n · (u0 + un) the official formula for it? Or maybe my brain is playing tricks with me after two weeks of holiday XD
(10 comments)

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