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ule 3: Greek...
ule 3: Greek Mathernaties x D assign9. spring2019.pdf 赝Area of a Circle by Cutting intc | × G area af a circle . Google Searc x × С https://earken edut to s . LexisNexis. Acad. D Apple et duvlid-9415706-dt-content įd-130483512 iCloud Dooogle Dwikipedia r Facebook /coursesns460 15477.201910/ass g a spring20 Q Pau d The weather Cna. Dvelp Dn) Twitter O YouTube a www amazon.com 4. (6 points) Let tn be the n-th triangular number, starting with t 1, t2-3, ts 6, etc. There are many interesting facts about triangular numbers. We will prove here some of them (a) Prove that tn=n(n21) (b) Show that t11 (c) Prove that Σ(1/tn) 2. Hint: Use the fact that n(n) T+1