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# Title: Qua Continentur De Angulo Contactus & Semicirculi, Disquisitio Geometrica. De Sectionibus Conicis Tractatus. Arithmetica Infinitorum: sive de Curvilineorum quadraturâ, &c. Eclipseos Solaris Observatio (shelfmark Leibn. Marg. 84:2)
# Folio 143, page id 824573315:0355
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20D.
Arithmetica insimtorum.
veriu sg; Seriei Tumma Scorsim innoTe(CCE Per prOD. 2 8r 20.
5, Nempe, summa Periei primanorum o F a. F b + C. EC,
quorum alcimum ek I, numerus locorum l. F L; crit
PeF PFOD. 2.
ec Cumma Ceriei sccundanorum 0+ a 2 + B 2 + c = _C,
quorum ulcimum cA +2 _ numerus Jocorum lF L; exie
61 L= vel = - 12 + + L1. Per PrOP. 20.
1+ E 12 + 1+.
CeriuCq; isicur lummX aggreBatuM (Puta
12 +
1 + Y
6 b) nempe
12 + 612 + 4 1
3
31= + 31F21 +3 pe FH 41 -
cA aggrexacum duarum serierum; cujus a8
+3
gresaci Cemiltis
lacus L. Idco9: -nnum
12 + 21
cA numerus pyramidalio cujuo
DROD. CLXXVII. PbcoreMA.
atus numeri cujulris Prramidalis ad ipsum nume-
rum Cuum, CAt wE l ad
Etc obenditur est in praeced.
+
212 + 21.
RC, daco numero poramidalie non innocelcie iptius lacus.
nist relolrendo Aquationem Cubicaro 6n = 1 + 312 + 2. l.
PROP. CIZXVIII. Zheorema.
Pries numerorum Prramidalium, in praemista
cabella commodeinterpolari porerit; Eiplorum
numeris laceralibus eot interponantur medixe a-
richmericae quoc opus est, e ex iis Formentur numeri
exramidtales, juxta prop. praeced.
Puca, Ei numerorum pyramidalium 1,43 10, 50, 35, 56, dic.
laceia