PONTIFICIAE ACADEMIAE SCIENTIARVM SCRIPTA VARIA - 28 
Then we will have 
I=2w n1=\fI+e + e 
A - 
) 
A 
1-e¥ 
-K —2K - 
Xn w,_,=A[1+2e +3e + 
À -K -2K —3K 
= —|e +2€ +3e Fo 
»—K 
A d I 
eË dK 1.7K 
(515-2) 
c (r-e”%) 
2 -K —2K “ 
Zn w,_,= Alr+4e + Qe or 
A —K -2K —3K 
=__[e +de +0e , . 
ok. 
7 
“111 Allais - pag. 218