IV. 



/^ 



= (53) == 



n n 



. fi 



x-f — 2(plx-}-^,p'(lxy) dx 



x'' -h Jf-'' X (Ixf 



= 1 fdpfdpfdpfdpfdp fcc.ll. 

 n n 



ctc. 

 Ex altera aiitcm formula integrali principali; 



e P ^ 



.V" — x~ " ;; n 



rx^ — A—f 



J x" — X-" 

 per dificrcntiationem nafcuntur fequentes acquationes: 



I. /- — IH^ — / jf — ^ 5 . tang. i-I, 



J x"" — jr~'^ X n n 



J .V ' — jf "■ X n n 



TTT rX^^-^-X—P dx .j ^j e ^3 . P? 



-/ .V — jf jr n n 



i\T r ^^ — x~~^ dx .j .. ^ ^ Pe . 



J X — X ^ X n n 



etc. 



per differcntiationem Tero colliguntur fcquentcs: 



, f.\-P-\- x-P dx e r^^ . 



P ? 



/ —j^y tang. '-i, 



J •V— jf-" x(l x) « ^ n 



x^ — x—^ 2p J X d X 



-z=.Lfdpfdpixu^.tJ 



G 3 III. 



