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# Title: Francisci Dulaurens Specimina Mathematica Duobus Libris Comprehensa (shelfmark Leibn. Marg. 134)
# Folio 181, page id 1066520976:0201
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LTBER TI. CAPUT TII.
161
VEL STC. Per aliam mecathesim habecur -+ a3 HI - F
Cea  + ccd. FFBO + CC. + a a :: -  a. + a -+ d.
IdestDr. 122:: 22. 42. Tuncisieur hic quatuor concinue
proporcionalesincelligenda, ec ex darisra cH, et d diffe-
reNEIa 22, _ 4 Guarieur 2 a.
VEE SIC FACIETUS. Per ram merathesim habCEUE + as
ccaH. F ccd. FrgO   = aHI -+ d. AFquI c. a.
12. a3
: Suncigicur hic quatuor continue proportiona-
lesincelligenda, e ex datis r CI, e d differentia 2=, e
4 Quarieur 2 a.
VEL SIC. Per aliam merachesim AC = a3- t cCaHI -
ad
ccd. Fr∞O - -. -F a TI = d. AEqui C. a. -. ...
lune isitur hic quaruor continué proportionales incelli-
genda, _ exdaris r2, cF, e d differentia 2 _ 4, guari-
CUT23 d.
VeL HOC MODO. Per ulcimam inetathesim habetur
a3 F CCaII = cCd. FFBO -FCC. - F CC = a a:: - F a.
= d. IdCA( p. 1 p2 = 022:: 22, 22 = 42. TUINE CrGO
hic quacuor continue proportionales intelligenda, e Cx
datisra cF, _ d differenci2 2e ex 4 Quarieur 22 a uc prius.
F Z ENT PL A TN NTUMER FS.
um
EAto - + a3 = + a = 6TI0. Tunc hic quatuor continé
proporcionales incellisenda, nimirum L. 2. 4 8-, e
AEP CMIF; 2 verO aMI2, ac differenria 2, et 4 nempe
61I d.
Zum
FAO - + a3 = 64 a = 192T10esthic incelligenda series
quatuor continue proporcionalium 8. 4. 2. I -:: _ FC 12 C
1I8. 2 vero a H4, ac differentid 2e ec 4e nempe 3 II d.
Elo+ ad bba oreot i clai