548 



2.5...(ft-iV) xa j^ X 



23,/ Xi(-ljX 2.5... (r+1) ^ 



rJV+'-_r(r— 1 )^+'-+'^í'^(r— 2)^+^— . 



&c. 



2.3...(iV+r) 



^_y/ .... m( m-l)...(m-A^+2)X(iV+l)iV(iV-l)...(iV-r+1) . , 

 i„,_i^ i;x 2.3.. .(r+i) ^^ 



24 ( Wr«l) 



r^+r.r(r-l)W+'-+ A— ^(r-2)JV+'--&c. 



X^ XS-^-'[(a+7i<^)"-^+<-a"'-^+M 



2.3... (iV+r) 



o=l, <r=l 



<,„,_(n+lji(-l) X 2.3... (r+d) ^ 



25< 



rN+r_j. (r_i )«+.^!±zll (r-2)^'+^— &c. 



X X (n-\-i) '«-^. 



2.3... (iV+r) 



