PAR IBM PLANA 



/' = ( /?, /?,'"-(- R, /?."') -h ( R,' R*+ R-! R," ) 

 / =(R,R i "'+R<R t "')+{R,'R»-t-Ii;il 

 r ( „ = ( R, B W+ fi . R,'" ) -H ( R,' />',"-(- R,» H i 



/ •, = ( r, Rr-h r, «:" > -+- ( r: r?.+ r; r: j 



/ = ( R, /</"-.- R 4 R,'" ) -+- ( R,' RJ-H /?,' R," ) 



r (IO = ( «, r,'"-h r, rj" +R i R i m ) -+- (r: r:-¥- r: /?,"-»- r: R ") : 

 /•,, = ( /t./v-H^i?,"'-*- r,r, '"-4- /? ; /?;") 

 -h ( r,' R/.+- /i 3 '«."H- r; «/'-»- r: K ) ! 



r M = (R, R/"-t- R, R, w -H R, /?/"-+- fl, R/« ) 

 .+. ( /?; i?;^ /? / r»+ r 3 ' «.»_»_ «.' # 3 " ) . 



■Yvec la formule [i] on oblienl : 



[3] §" = 



a5 i?,*-H 400 /?,'-»- 36oo R % *-h 900 i?/-4-5o( 2 /?, R5 ) 

 -l- i5o (a /?,«,) -»-20o (2R 1 R 5 )-+- 1200 (3i?,/? 3 ) 

 -4- 1 800 ( 2 i? 3 /? , ) -+- 1 00 ( 2 7?, R, ■+■ RS ) -+- 3oo ( 2 7?, fl 3 -+- 2 fl, fl, ) 

 -I- 600(2 R,R. +2/fji! s ) . 



Lt par le i-hangcmcnt de R, , Tf, etc. en /?,"', /?/" etc. on tirera de 1 1 

 la valeur de |" *. Knsuite on trouvera 



[4] i'i-Hh^ i = 



25 F (0 -4- 400 Y w -+- 36oo J" 3 -f- gooi' (i -+- 5o J 



i5o F m -+- 200 K (:) -+- 1 200 F (4) ■+■ 1800 K (9) 

 3oo Y .,,, -1-600 J' (ll) ; 



[5] ITiHlV 



25 I"',, -+-4<>o 17m -»-36oo !''(,, -+- 900 ) . 



100 } 





(■»> 



!5o} 



m 



iOO J 



M 



laoo J", 



• 



1800 1 '. 





5ol ' 



ion) 



(■•) 



3oo !''(„ -j-6ooF' (ll , ; 



