uz(Q f N) cresc . max lim , ; — — e Q . o . 2 — =qo

Un-hi — U,i

19. 1^ £ (Q f N) cresc . » s Q . mm lim — ^ — ; — -—, — t, — -^ — rrr^

^ ^ ^ . 10gi^,JOg^î^rt...lOg''' %/»(l0g"%^,)^+l»

20. 9 , — , -T- £ (Q f Q) decr . (^— /i) £ Q f Q . lima^^oo /la; = oo . i? £ Q . min

llIïW=oo 77 , V /;, N > 1 . O . 1 9 (7l> = 00 .

(/la;-hp 7- /i^r ) 9 {hx ) ^

21. 9 , — , -T- £ (Q f Q) decr . (^ — ^) £ QfQ . lim^^^oo /i;r =oo .i> £ Q . max

hmo^^oo 7T , X , ., ;, < 1 . . 2 9 (7^) £ Q .

1 Qûc-\^û "~~ yjc