52 



18. /i(.V) 



BELL SYSTEM TECHNICAL JOURNAL 

 .375 _ .1171875 .102539 



(27rX)"2 



...«,v)~(3^)"'.-{.-f + ■. 



X2 



0703125 



20. Ki{X) 



X2 

 1171875 



+ 



• X X2 ' X3 



Fig. Al.l shows Io{X) (solid line) and the first two terms of 13 and the 



first term of 17 (dashed Hnes). 



Fig. A1.2 shows Ii{X) (solid fine) and the first term of 14 and the first 



term of 18 (dashed lines). 



7 + 1 



n(f)}.(: 



Fig. A 1.3 shows A'o(X) (solid line) and 

 first term of 19 (dashed lines). 



Fig. A1.4 shows Ki(X) (solid line) and It + In (j)\hO 

 the first term of 20 (dashed lines). 



(X) and the 



(X) + 1/X and 



100 

 80 



Fig. Al.l — The coriTcl vuluc of /o(.V) (solid line), the lirst two terms of the series 

 expansion 13 (dashed line from origin), and the first term of the asymptotic series 17 

 (dashed lino to right) 



