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# Title: [De la Methode de l'Universalite] De la Méthode de l'Universalité (shelfmark LH IV, V, 10)
# Folio [68]r, page id 00066634:0135
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In problemate ducendorum ad sectionem sonicam perpendiculanum, aequatio
prrdit haec: da +C
aXY + ad X (+
Et jam data est haec ex a 2 (7) 1...
.
ipsius sectionis natura:
n
2aX = a X LF1
+
 priori jungatur, fietque 
s
a 
ts
qb
a g
(B)xy
+BX XC.
et rursus addatur prima mul-
ad
s
tiplicatio ducta in Y.. . . ...a
y
.
vel Xy - da
V
C
F) a y +da (10. 
_. (F) f.
e
+2
D2β..
in aequatione data sectionis Conicer pro X ponendo ejus valorem fit
2b LXV +0
Fax
41=
ma
+cy +oda
V
+ ad y +a 01 +da
d.. bqu L
q +. B
ad
az +aey 
as
+
y
s
a B
+)2)_
u
(C7
et adque + ax + aey p fyq + fyx
l
1
+da
+ Vd
=X
Ergo XFZ
ta
XVd
l+7C.
a
uba
C+ γ
i
-b ud
bhi
+2β.
d
c+
(2
y + ad X + CY +
a 10
6
feratu
a
a
C +
Z X
ra x + a
X H. V
Ergo X H + a x +
2