Let ns Sees ae ak Ca F < co 
j 
¥-1 = 
at ee (et) Be oF 
oF P; =¥ 
Since 
the above is equivalent to 
v(E)F mle )F +u(F) 
Substituting the value of U, we obtain 
cs ens EE HF p0-pis Hoy econ gay 
This may be proved by a method similar to that used in section 
ee For any real, non-zero value of A,B 
A® - 2aB + B® D0 
2 ‘ ee 2 -i 
Let ASS UP=1) (CE RL), Bo ae t= PE) 
ten (S* 5 Fy-2fo-syre He gcetow Fay t+ 
+ (-§)(- 7 F)>0 
CM © 05) 0 I) ed Ct 3 Cel CN Ck 
+ (t- s(—¢ Ey> C-€)( -«) + (621) (- 8) + 
refu- sys Ente aueg’ Fy 
{CF Oc pt En © 0-5 Hy u-pyg” Ey 
+ soe 578) + afu-sug Ege ones’ Aye 
sys 
