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# Title: Francisci Dulaurens Specimina Mathematica Duobus Libris Comprehensa (shelfmark Leibn. Marg. 134)
# Folio 180, page id 1066520976:0200
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180 SPPETMLHUM MA THEMATTCORUM
proportionales incelligenda, nempe V 2 ]. 2. 4. 4 :
de ACFCHV 2 I, 2 verO aHI2. AEd AEGrCGATUIMZ~, e
4e videlicet 6.
PX EM P L UM ZUM PN N UM ER IS SUIRDTS.
Fsto - + a3 = + 8 a = 24 1I0. Sune hiC quaEUOF COnti-
nue proportionales incelligenda, nempe 2V 21. 2.
21. 1:-, _ Aer CTI2V ZI, 22 VerD aHI2, AFd a8-
BregaTu 2~ _ 4E videlicerz.
FAO2O - F a3 -F CCa - F CCdHI 0, sive per mecathesim
F a3 - t ccaHI = ccd. ErGO - + CC. -+ CC-+ a a :: -+ a.
d. IdestD r. 1 p - + 42 : : 22, 22 - + 42. TUnE igIEUE
hic quacuor continue proportionalesincelligenda, e ex
datis r cF vel A, cum d agreratOZ XC 4 , quarIEUEL a,
uC priis.
VeL SiC. Per aliam merathesim haberur -+ a3 II -
cca = ccd. Er∞O - t CC. - t a a : : -1. a. - a - d. Idest
Or. D 22: :22. 42. Tuncisieur hic quacuor concinue peo-
porrionalesincellisenda, et ex datis 12 cF, vel H, cum d
29OrC52TO2, _ 4, QuarIEuEZ a, uepriuS.
VEE SIC PACILTUS. Per ram mecathesim HC -p a3 -+
a3
a2 a3
ccaHI = ccd. FrgO-+ = + aII = d. ACquiC. a.
 ErGO_E CAF. UF priuS.
C CC
Parethanc aequationem non differre ab ea qua ium pro-
Polica est, nisi per murationem signorum in locis per Pa-
resnumeros delignacis.
Est030 - F a3 = cCa = ccdHI0, SIVC Per CTAFhC(M
+ - a3 - cca TI - F CCd. ErgO -+ CC. + a a = cc:: + a.
=+ d. Idest 1 p. O 2 - 11~: : 22. 43 - 22, TUNE igIEUF
hic quatuor continue proporrionales incelligenda, e Cx
datis L. CH ex differencia 2 e q nimirum d, quxrieur 2 a.