EXAMPLES OF ELIMINATION. 279 



29. If u = xyz.F{f 1 (x 2 + f + z^ > / a (xy + xz+yz)}, then 

 . du . du . .du 



so y 



30. Eliminate z from the equations 



Result. 20 (a?, y) = 



31. Eliminate the arbitrary functions from 



32. Shew how to eliminate the n arbitrary functions from 



