78 MHH. IAT£C. FORM. DIFFEREKT. RATION, 



± ^corA.^t''/('-f-*-vcorA.,-,H-.v.v)^- ;;:^ 



fin. A iL^-^;l? A tang. "^' ^"- ^ "~^ 



i-i.vcoI.A- 



± -^cof.A.^-^ /(14- ^^xcoCA.^^xx) ± ^, 



fin. A"-^-il^ Atang.-^--^-»--. 



i-i-.vcol. A- 



vbi flgnonim nmbiguoriim fiipcriora valcnt , fi ;/; ell niH 

 nicnis par , infcriura vcro fi m niimcrus impar. 



Ponamus i.im n cfTc numcrum imparcm , atquc nd ar- 

 cuum \|/ vcl (P valorcs inutnicndos , rclului oportct hanc 

 ac(]uationcm . 



cof. Afi\\y~r- cof. A {n-z)\l/ -h cof. A («-4) \\/-h- ~\~ 



cor.A.3 v^^-t-cof.A \\j—o 

 Qiinrum nrcuum in progrcflTionc arithmctica progrcdicntium 

 cum fit ditfcicntia rr 2 \|/ , crit cof. A « \|y — 2 co(". A. 

 s. \{^ cof. A (w— 2 ) \[/— cof. A(m — 4.)\jy. Formcnuis er- 

 go has acquationcs : 



-+- co/.Aii\J/-4- -i-coJ,A.^\l/^ nf..\.,yl/^eof..\,\i/-^a 



-7cf..\,y;iecJ.\i.\[^,nf..\.:\l>.cif.Mn--:'yl/- ... - j«0!.A:\l»o,..\.,<^-ie3,.\.:vtw/.\»i'— o 

 -♦-"/•An\^->-ft)/.A(n-:>iH-c'/.\(n-4;*{M- . . . — w/.A »|» ~ o 



(juanim (iimma dabit hauc acvju.itiuncm : 



(i-j co.A.:<J/, ro/.A.r.\|«_». co/. A(n- > 5»|/-+- fo/. A. j xj -f-(i- a cr/.A.:\|/) Cf/.A xi- — o 



Atcft cof A. 3 \J/r= corA\|/C()f.A.^v|/-(in.A\|^. fin.A.2\|/ ct 

 cofA 3\|/ 2cofA\[/cof A2v|/— -cof A\|ycof A2\|y-fin.A\|y 

 fin.A2\|y— - cof A.\|/ cx quo critcof A.3^^-i-(i-2Cof A.2\|y) 

 co(.A\|/ro.Dcindc cU cof.A(;;-2;\|/— fin.A.2\|./fin.AN\J/-h 



cof. 



