max lim v^^ijvn =oo.St;^eQ:-=t,A

52. v f Q f N . min lim {u^ vjv^^, — w^^. J > . o . S v^ £ Q .

52'. » . min lim v^u^^O . min lim v^t^n^n+i/(î^n^n— ^n-M Vn+i)>0 .

qo 1

53. » , 2^ — = 00 . max lim (Un ^n/^/n-i— ^n+i) < . o . 2 v^ --= oo . 53'. * . > : n £ (m -4- N) . On . (u^ v Jt?n-hi— î^n+i)<0.o.2 v«, =qo .

54. v e Q f N : n e N . On . ^^^ < ,— ^^^^ . o . 2% e Q . [82 P24 , §3 P13]