Huygens, Christiaan, Christiani Hugenii opera varia; Bd. 2: Opera geometrica. Opera astronomica. Varia de optica

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154427ET HYPERBOLÆ QUADRATURA. exponentem rationis Y ad A; denique ſemper demonſtrabi-
tur terminos convergentes ſeriei exponentium eſſe exponen-
tes rationum, terminorum convergentium ſeriei propoſitæ
ad primam ſeriei quantitatem A, modò utriuſque ſeriei ter-
mini convergentes ſint in eodem ab initio ordine:
& proin-
de terminatio ſeriei exponentium per hujus 7 inventa, quæ
Ex:
Gr: ſit L, erit exponens rationis, terminationis ſeriei
propoſitæ ad primum terminum A:
inveniatur igitur ratio
Z ad A quæ ſit multiplicata rationis datæ B ad A in ratio-
ne data L ad H;
eritque Z terminatio quæſita, quam in-
venire oportuit.
Ad hoc problema in numeris illuſtrandum ſit M 4, N 2,
O I, A 6, B 10;
erunt ſecundi termini convergentes v960,
V992160, tertii termini convergentes V9997776000, V9999100776960000000.
&
ſeriei terminatio Vc360.
Aliud exemplum, ſit M 6, N 2, O 3, A 5, B 10;
erunt ſecundi termini convergentes Vc250, Vq50, tertii termini
convergentes Vqcc488281250000000, Vqqc7812500000, &
ſeriei terminatio
Vſ12500. hactenus terminavimus omnes ſeries convergentes quæ
fieri poſſunt vel à ſola proportione arithmetica vel a ſola pro-
portione geometrica, nunc vero methodum aggredimur, cu-
jus ope omnium ſerierum convergentium terminationes (ſi
modò ſint in rerum natura) inveniri poſſunt.
PROP. X. PROBLEMA.
Ex data quantitate, eodem modo compoſita à duo-
bus terminis convergentibus cujuſcunque ſeriei
convergentis, quo componitur ex terminis con-
vergentibus ejuſdem ſeriei immediatè ſe-
quentibus;
ſeriei propoſitæ terminationem
invenire.
Sit ſeries convergens, cujus duo termini convergentes
quicunque ſint a, b, &
termini convergentes

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