\ 
S S 4 _ gs ) o ( Sëà _ 
ti gradus per methodum notiffimam transformantur. 
Deinde fiat «*■ = y -4- D, erit • 
y* 4- 4 Dy'> 4- 6ZJ 2 j 2 + qD*y 4 - Z) 4 = o 
4- Jy* 4- zJDy 4- AD % 
+ By + BD 
j + C 
Aflumantur jam l* = D 4 - 4 - AD 1 4- 2?Z> 4- C, ai 
4 Ö 
= 4Z? , ab' = 4Z) 3 4- 2^-ZZ) 4- B\ erit — = 
4 Z) 1 4- z AD 4" B 
-77-, 4ÜZ 2 = 4Z) 3 4- 2AD 4- Z?, atque 
j 6Z> 2 Z 4 = i6Z) s 4- 16JD* 4- 16BD 3 4- 16CÖ 2 = 
(4 Z) 3 4 - 2JD + BY = 16Z) 6 4- 16J 2 Z? 4 4 - 4^ 2 D i 4- 
%BD % -\- aABD 4- 5 2 ; undegÆZ ? 5 4- i 6 CZ > 2 = 4^ 2 Z > 2 
4- i\JBD 4" 5 2 . Poterit ergo D per æquationem Cubi¬ 
cam determinari, quo dato habetur = (D* + AD* 
i 4 D 
4- B D 4 - C) 4 , a — ——, & tandem j 4 4 * a h ’ + 
£>D*y* 4 - ab'y q- b* — 0, 
4- A y 2 
quæ cum forma fupra refoluta coincidit, modo fiat cb * 
= 6 D 2 4- De hac Analyfi obfervari merentur 
I 
1:0 pofito fieri Dz=zo,û~o, b^zC^yC — 
—7, z — ±: V2~ -!• 2:0 Si 4C=#, erit s/J 3 
C a i 
«, v . S 
— 2AD — 5 = 0, æquatio exprimens valorem ipfiiis 
D, quæ cum forma $phi fecundæ proxime convenit. 
3:0 dato io 2 =r— 2, five z 4- qa = 0 , ob a = 
4Ö 16Ö 2 4ZM 6D* 4- /4 
~y, erit a 2 = > f — 2 — ~y = - y - 
—2,Z‘=D 2 +q^,(Z 7 2 4 -^j 2 —D^+JD^+BD^C, five 
— 4C 
i^ 2 —Z-Öq-C, Z 5 =—--—. 4:0 Denique fi s 2 = 1, e- 
rit 
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