1. 04 2 20 2553 11.30 - 13.30 . 1 36 ( 136) 1 1. A = {1, 2, 3, . . .} B = {{1, 2}, {3, 4, 5}, 6, 7, 8, . . .} 1. AB 5 2. BA 4 3. (A B) (B A) 4. AB 52. 1) A 2) A 1. 2. 3. 4.

2. 04 3 20 2553 11.30 - 13.30 .3. . . 1. . . 2. . 3. . 4. . . 4. s, t, u v s

3. 04 4 20 2553 11.30 - 13.30 .5. 2|5 x| = 1 1. (10, 5) 2. (6, 4) 3. (4, 5) 4. (3, 6) 36. 4x2 + bx 6 = 0 b 4 1 1. 2 2. 2 1 3. 4. 2 27. 1. (1)0 2. (1)0.2 3. (1)0.4 4. (1)0.8 28. |4 3 5 2| |3 5 5 2| + |4 3 3 5| 1. 0 2. 180 3. 192 4. 200

4. 04 5 20 2553 11.30 - 13.30 .9. a n n . n a = |a| n . an = |a| 1. . . 2. . 3. . 4. . . 10. f (x) = x2 + x + 2 1. f (x) 0 1 x 2 2. f 3. f 2 4. f 2

5. 04 6 20 2553 11.30 - 13.30 .11. 1. {(1, 2), (2, 3), (3, 2), (2, 4)} 2. {(1, 2), (2, 3), (3, 1), (3, 3)} 3. {(1, 3), (1, 2), (1, 1), (1, 4)} 4. {(1, 3), (2, 1), (3, 3), (4, 1)} 12. f (x) = 3x g(x) = 2 + |x 4| Df Rg 1. (, 3] 2. [2, ) 3. [2, 3] 4. (, )

6. 04 7 20 2553 11.30 - 13.30 .13. f 11f (11) 3f (3)f (3) 1. 57 2. 68 3. 75 4. 86

7. 04 8 20 2553 11.30 - 13.30 .14. 600 75% 1. 120 2. 40 3. 60 2 4. 20 215. ( 1 1 ) 50 x N 1. 31x x2 = N 2. 29x x2 = N 3. 27x x2 = N 4. 25x x2 = N

8. 04 9 20 2553 11.30 - 13.30 .16. A B 1. 1.5 2. 3 3. 2 4. 2 217. sin cos 72 0.951 0.309 73 0.956 0.292 74 0.961 0.276 75 0.966 0.259 7, 24 25 1. 15 2. 16 3. 17 4. 18

9. 04 10 20 2553 11.30 - 13.30 .18. 60 3 3 1. 2 3 2. 2 + 3 3. 2 3 3 4. 2 3 + 3 19. 2 45 30 ( 3 1.73) 1. 1.00 2. 1.46 3. 2.00 4. 3.46 3 120. , 1, , . . . 40 42 2 2 1. 18 2. 19 3. 37 4. 38

10. 04 11 20 2553 11.30 - 13.30 .21. 40 an = 3 + (1)n 40 1. 10 2. 20 3. 30 4. 4022. a1 , a2 , a3 , . . . a2 = 8 a5 = 64 10 1. 2, 048 2. 1, 512 3. 1, 364 4. 1, 02423. 1 1 1. 2. 2 4 1 1 3. 4. 8 16

11. 04 12 20 2553 11.30 - 13.30 .24. 110 1 5 2 8 1. 2. 9 15 2 11 3. 4. 35 15625. 177 145 S = {H | H } T = { H | 145 H 177 } () 1. S T 2. S 3. T 4. S T

12. 04 13 20 2553 11.30 - 13.30 .26. 1 6 4 1 1 1. 2. 18 12 1 1 3. 4. 9 327. 40 3 20 12 5 1. 2. 3. 4.

13. 04 14 20 2553 11.30 - 13.30 .28. 48.01 43 57 45 1. 2, 236 2. 2, 279 3. 2, 322 4. 2, 365

14. 04 15 20 2553 11.30 - 13.30 .29. - 10 5 7 8 6 7 8 9 7 0 4 4 7 8 1 1. 2. 3. 5 70 4.

15. 04 16 20 2553 11.30 - 13.30 .30. 1. 2. 3. 4. 31. 41, 88, 46, 42, 43, 49, 44, 45, 43, 95, 47, 48 1. 2. 3. 4.

16. 04 17 20 2553 11.30 - 13.30 .32. 200 1. 12 16 16 18 2. 12 18 18 24 3. 10 12 18 24 4. 10 16 16 24

17. 04 18 20 2553 11.30 - 13.30 .33. 400 3 60 1. 15 2. 30 3. 45 4. 60 34. 26 711 11 0.2 1216 14 1721 6 0.3 1. 26 2. 711 3. 1216 4. 1721

18. 04 19 20 2553 11.30 - 13.30 .35. .. 2551 4.29 .. 2550 .. 2551 ( 100) .. 2550 .. 2551 1.0 1.0 0.9 1.3 1.5 1.2 () 1.3 0.9 1.2 1.2 1.2 1.1 . .. 2550 .. 2551 . .. 2551 39 1. . . 2. . 3. . 4. . .

19. 04 20 20 2553 11.30 - 13.30 .36. 1. 2. 3. 4.

20. 04 21 20 2553 11.30 - 13.30 . 2 4 ( 3740) 1 1. 3 2. 3 ( 0 ) 3. 3 1. 0 000 2. 47 047 3. 209 209

21. 04 22 20 2553 11.30 - 13.30 .37. 36 50 44 15 12 7 5 38. 12 14 16 15 39. 0 9 3 40. 3 3