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Apollonii Pergaei quae graece exstant cum ... - Wilbourhall.org

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EUTOCII COMMENTARIA Ilsr CONICA. 359<br />

Aliter prop. XLIII.<br />

Sint oppositae A, B, et liyperbola FAB^ utramque<br />

oppositam secet in JT, A, B, z/, opposita autem eius<br />

sit EZ. dico^ EZ <strong>cum</strong> neutra oppositarum concurrere.<br />

ducantur enim /IB, FA producanturque et in ®<br />

concurrant; igitur intra asymptotas sectionis PAB<br />

positum erit [II, 25]. sint KHA^ MHN asymptotae<br />

/^Tf<br />

sectionis FABA] manifestum<br />

igitur, rectas<br />

NH, HA sectionem EZ<br />

comprehendere [II, 15].<br />

et FA sectionem FAl^<br />

in duobus punctis F, A<br />

secat; producta igitur<br />

in utramque partem <strong>cum</strong><br />

oppositaz^J50 non concurret<br />

[II, 33], sed inter<br />

sectionem BO rectamque<br />

AH cadet. iam<br />

eodem modo etiam AB® non concurret <strong>cum</strong> FAlSi,<br />

sed inter AS et HN cadet. quoniam igitur ®n, ®P<br />

<strong>cum</strong> sectionibus A, B non concurrentes asymptotas<br />

NH, HA comprehendunt et multo magis sectionem<br />

EZ, EZ <strong>cum</strong> neutra oppositarum concurret.<br />

Aliter prop. LI.<br />

Dico, sectionem E <strong>cum</strong> neutra sectionum A, B<br />

concurrere.<br />

In fig. S;, O om. W.<br />

^fi] AH p. 18. ASSi] AIb: p. 19. @n] @B p. 20.<br />

3rfptf;^ov(7t] p^ nEQL£%ai6iv W. 21. TCoXXm] p, noXXo W. 23.<br />

Ante vcc' eras. a W.

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