则/(=∑( k=1 又()=∑C(=-b),0<-b<R R<R'<mnb-bk≠1 /(k=∑C(=by在 而(-b)=2k=-1 k≠-1 5/(=C127=2s/()( ) å ( ) ò ò = = n k l l k f z dz f z dz 1 则 ( ) ( )1 1 1 f z C z b ,0 z b R k k k = å - < - < ¢ ¥ = -¥ 又 ( min , 1) R < R1 ¢ < bk - b1 k ¹ ( ) å ( ) ò ò ¥ = -¥ \ = - k l k k l f z dz C z b dz 1 1 1 ( ) î í ì ¹ - = - - = ò 0 1 2 1 1 1 k i k z b dz l k p 而 ( ) ( ) 1 1 2 2 res 1 f z dz C i i f b l \ = - × p = p ò