( 79 ) 
maximum when the Parts arp a i 
For Jet tlie Point D be whfre W 
greater than A C x • 
CDxDexeB ^ C D E e — B 
B^ and foJtfc f ° ^ B is greater than 
be Meded in C and D™® and CE muft 
Parts AC,CD DE^E^B all the 
themfelves, that their Produft may be .amongft 
Lemma Vit Th» q ? ^ ® ntaxmum. 
be 
another is a maximum when the PprrQ 
s™ rf«p A™ cb+?d' SBiSl' 
X EB : Now that DE V F R maTr K ^t>-|-UE 
muft be bifTedred in E by the v* 
fame reafon AD and CE^muft be bifl'efted i^r ^°Vn 
thattheSum of all^hefe’ Sua™ bef 
three ParTs of Ae Se I b i,f ^ny 
Parts areequal^^ 
+ >< AXircD4rTcirT5Tr:r^ 
fuppofing the Point E Jven it is man1f ft r ^ ^ 
be equally trifefted in C and D thaT^^C J r ' 
?"AcirETc&^ 
Smma viK^ Frol M Zfl by 
Le„„^ IX.*!, i, mamfellthat’^bi'i'vrf"' 
foning IS general, and that the Sum of ^ 
betng given, the Sum of alAthr^^tSr^ 
made 
