556 PpiRi Callegaei 



24. Resumpta expressione functionis U„ , propter solilani 



derivatioms legem obiiaetur 



n . U„=U'„ .2-2([l(i)]-H[l(id(2)])z" " 

 ^.4([1Tl)]^-[1 (»)-t-?7. +1 (3)])z"~ 



^l- n— 6 -1 r n— 6 nx n— 6 



_g([i(<)_h . . _h1(-^)J-i-L'I (')-+- • • • -Hi wj> 



■4- 



Ast habebimus [i(0]h-[i(o"-4-1 (-)]=?? ^ 



'"-=5fcfci>=^[i<o^":.Vip.], 



et ideo propter subsiiiiuionem assequemur 



, n — 2 n — 2 



Praeterea patet esse 



n — 2 II — 2 n— 4 n— 4 n — 6 n — 6 



».U„=U',..s— 2rif [1(')j= — [1(')-t-1(2)J= H-[1(')-l- . . .-4-1(3)]; ] . 



U„_2-4-U„_4^U„_6H-U„_8-f- =[l {')]•=" — [l (')-h1 (^i"~ 



tn — 6 -, n- — 6 

 1(')-K....H-10)> — , 



ergo 



-i .n (u„-i-2(U„_2-f-U„_4-t-. . . ~\ ^-^ . Ui^-^2 • Uo) 1=^'" Cf ) 



Exinde haec deducuntur 



(1) Quomodoexpressiones , — — (quae functionesUi 



Uo multiplicant prout 7J est par vel impar) determinentur, innote- 

 scit ex specimine nostrae Polygonomelriae Analiticae pag. 20 edito. 

 Foro Cornelii anno 1.83 ft. 



