• •■ D A S S C I E N C I A S D E L I S-B o Aí ;' a Ç >> 



.V r » 



§. 9 — Theorema; ■(V^)'=\' A<=A 

 Demonstração. 

 .v_ . ! l — jr .V 



V^^-VÍ . . V . ç 



Logo ( V yí)"^:= V A'' — A. ..q.e. (i. 



m m m 



§. ia— Th. i/^vjzzza.b 



> Dem. 



, . >« mm 



{ao) z=:<i .0 . q. e.d. g 



§. 11- Th. \jlb-\/i:.\fJ 



Dem. 



,-_ r r_ 



(V^J)^* (\Jb)-b 6 



a.b-^y/ãiislT,) 



a.b = (y~a.\f-by IO 



\/Vb=V{Va.\/b) 



r r 



^i\J a.\/b . . . q.ej . ....;.. y 

 §. 12 — Th. B. B.B etc. -B^^^ 



Dem. 



B"'. B^^B^B3,,,BiE;B-^B,...B„ , 8 



