30, 5

1

30 5(20/120) 1 ( 10+2+8) (A) :

nnfnnf

nnnnfnnf

nnnnf

n

n

n

n

25

5,15,14

25log3

32

3201121

log22log)(2log)(

log)(3)(

loglog)(

2

2

+=

+=

+=

+=

+=

(B) )5(2 5loglog nn O=

30, 5

2

() n , : (i) -, 3

4n

8n

, (n).

(ii) B -, 410

n

915

n , (n).

(iii) -, 74n

154n

, O(n).

.