Page 18 - Past Year

16 | P a g e

15. k  21, T  11 37

16. 699050.5

3
17. r 
5

2
18. S  n 4n  3n

19. a  4n  1

,
20. a   257 , d  51 S  4550
20
21. (a) First 5 terms = 21, 18, 15, 12, 9

(b) S  2625
50

2
22. (a) Proven (b) a   6 , r  

23. (a) 24 months (b) The total amount is RM9300

 1 15
24. (a) r  1 , s  (b) x  , y  11
2 2

(c) (i) S  17 (ii) n  16
3

25. a   27,r  2 ,S   65
3 4
26. (a) 63 seats (b) 880 seats (c) RM 200 300

27. m  5 or m   8

28. 67

29. (a) RM3110 (b) 38 years old

 
 
 
 
3
2
4
30. (a) 100,100 1.1 ,100 1.1 ,100 1.1 ,100 1.1
 
(b) Geometric sequence, T  100 1.1 n 1
n
(c) RM10671.90
(d) S  n 1000 1.1  n  1 ; RM 16449.40