CALI DLU& 



>_,. and the continual pnluets : prove that when 



:: umber of term> i> iiuK-liiiitrly increased 



.,- = r (--), 2y = r(<? + -); prove that 



ro> / * roo 



I I vdxdy= I I vrdrdBy 



J Jj, Jo J 



g a fiinction of x, y, which becomes v when their values are 



:i tuted. 



1025. If AV = iy = & = ...=xyz..., then wi 



V being a function of A", F, ^... which becomes v when thrir 

 values are substituted, and n being the number of integrations. 



Ptare tliat 



n 50 / Vdxdydz=F Cf 

 , w ' / ^o-'o 



a5-fy + c = ^ y-fz = r, 

 IOL'7. I'n.ve that 



O / / /. / /! /-I 



II Vdx^dx^dx^ I \ I I rxxv ^ 

 /, y a ^ ^ y '// 



where &t + &t + o^ + 4 s tt ( , , + ,-- a; 4 



! 1 - Prove that 

 



f... F^db.A^ifa.db.cfa, 



Jtf '0 



, 



