All-101 96 



But J 



,AP+P, 



log ^ = - log £^ = - log (-4-^2) = - log m + 1) 

 P-h Po pQ Po 



Since tliG term ^P- Is small wo can v/rlto 



^o 



logCi + Aa) = §£ - 1 (A£)2 



*^o ^^o "^ Po 

 Honco (2) becomes 



M 1 9E dz = g (C 4- P^ ri + 4) |:i 



'_j^ p ax Ap ' 2 ax 



Similarly, 





Where D = G + | . 



