o..-^\.

,'J/a*Js \z

X+C '+l

Jr J'sd> dxz

dx

P'r l

YL+ I f+t

S fli'o^re

t+t

LferS:

) - (cx+ cr )z

l- Cx{-cr

cxr-cr)

- ( cxpCl

Cx {- Cr

cx+cl

=+ d'"t = Jx

- \^2

$',)r*, o\..^I,.p.lpo-to} :

C1 \2q,Z

-c.$s e irro-t