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# Onet math

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• 1. 04 4 40 8. 1. sin 30°+cos60°=1 2. cos30°+sin 60°=tan60°1. 3. tan 45°+cos45°=2 4. tan 60°+cot60°<1 () a, b ab 9. ABC BC 18 B=30° () a b C=60° AC ab 1. 10 2. 9 3. 8 4. 7 10. A B C 1. ( ) () 2. ( ) () 3. ( ) () 4. ( ) () 1.A∪B2. 1 − 0.5 180 − 2 1 2. B∩C 5 20 1. 3 2. 3. − 3 4. − 3.B-C 5 5 5 53.  1   4. A-C  xEI  + x (10 − x ) > 0   2   11. 350 1. 1 2. 10 3. 12 4. 15 1 1 1 1 1. 1 2. 3 3. 7 4. 94. 1 4 ( 3) 3 − ( 24 ) 3 + 576 6 − 6   6  12. A={a,b}B={c,b,a}  81  1. 6 2 2. 2 3 3 3. 4 3 5 4. 2 (AxB)∩(BxA)5. a b 1. 3 2. 4 3. 6 4. 8 13. A={0,1} B={a,b,c} A B 1. a+b 1. r1 = {(a,0),(a,1),(b,0),(c,1)} 2. a + b 2. r2 = {(a,0),(b,1),(b,0),(c,0)} 3. b + a 3. r3 = {(0,a),(1,a)} 4. a ≠ 0 (a) (b) 4. r4 = {(a,1),(b,0),(c,1),(d,0)}6. 2− x <5 14. 1. 9 1. 2. 2. 3. -3 4. 77. C 3. 4. A 210 B 1. AB = sin 21 ° AC 2. AB = cos 69 ° AC 15. x 2x − 1 y= + 2 3. AB = sin 69 ° AC 4. CB = cos 21 ° AC x 2 + 3x + 2 x − 1 1. -2 2. -1 3. 0 4. 1 (40)
• 2. 16. x 2 x − 2 x −1 = 16 25. x2 + x +1 1. 1. 28 2. 20 3. 25 4. 3117. r <1 2. 1. 2,1,5,1,0.5, 2. 3,6,12,24, 3. a n = ( −1) n 4. =  − 1  n 3. ( ) an   ( ) 2  218. 5 16 3 6 4. 15 1 23 1. -4 2. -1 3. 1 4. 5 26.19. 1.3,1,2,3,6 2. 4,3,5,4,4 32 18 3.1,3,1,4,6 4. 5,6,7,4,5 16 27. 4 , 8 10,11 12 1. 4 2. 5 3. 6 4. 7 1. 6 2. 8 3. 14 4. 18 28. . 10 3520. 1. 12 25 16 13 2. 1. 28 2. 32 3. 34 4. 36.5 2 29. 1. 1. 2. 2. 3. 4. 3. 30. 30 4. 2021. A={1,2} B={1,2,3,4} r={(y,x) E AxB|x≤y+1} 1. r 2. 1. 4 2. 5 3. 6 4. 7 3.22. y = c − 2x − x2 4. -2 y 31. 1. (0,1) 2. (0,2) 3. (0,-3) 4. (0,-4) 20 ( ) ( )23. ∑ (2⋅3n ) 16-20 2 n=1 1. 321 + 3 2. 3 21 − 2 11-15 9 3. 3 21 − 3 4. 320 − 1 6-10 1224. 10-100 7 4 1-5 10 1.689 2. 890 3.780 4. 1071 1. 8 2. 8.5 3. 9.5 4. 7.5 (41)
• 3. 32. 36. 2 5 3 2 3 1. 1 2. 1 3. 1 4. 1 2 3 6 12 4 5 4 4 2 37. 10 3 5 6 1 2 5 2 6 2 1 1. > 1. 1 2. 1 3. 2 4. 3 2. < 2 15 15 50 3. > 38. GENIUS MATHS 40 4. < 5 2 333. 2 1. 100 , 1 1 , 1. 1 2. 1 3. 3 4. 4 2. 10 5 5 5 39. 0.2 0.1 3. 0.25 4. 40 60 1. 0.05 2. 0.1 3. 0.3 4. 0.7534. 40. 5 1. 81 2. 162 3. 243 4. 324 30-39 13 40-49 15 50-59 20 60-69 30 1. 40-49 50% 2. 60-69 3. 49.5 59.5 4. 59.5 40-4935. () () 1.( ) () 2. ( ) () 3.( ) () 4. ( ) () (42)
• 4. 04 1. 2 21. 2 2. 1 22. 3 3. 2 23. 3 4. 2 24. 1 5. 4 25. 4 6. 1 26. 3 7. 3 27. 3 8. 4 28. 3 9. 2 29. 110. 4 30. 211. 4 31. 412. 2 32. 313. 3 33. 114. 2 34. 315. 3 35. 316. 4 36. 317. 4 37. 218. 1 38. 319. 4 39. 120. 4 40. 2 (43)