Question

26. 2-50x
28. 4x2 - 9
-
30. (1 - x2
1-x2)(1 - y2) + 4xy
32. 2(x - 2y) - 50y?
34. X-1
36. 2x - 32​

Answer 1

Answer:

I, §2, p. 13

1. - 3 < x < 3 2. - 1 ~ x ~ 0 3. - j3 ~ x ~ - 1 or 1 ~ x ~ j3

4. x < 3 or x > 7 5. - 1 < x < 2 6. x < -lor x > 1 7. - 5 < x < 5

8. - 1 ~ x ~ 0 9. x ~ 1 or x = 0 10. x ~ - 10 or x = 5

11. x ~ -10 or x = 5 12. x ~ 1 or x = -! 13. x < -4

14. -5<x< -3 15. -3<x< -2 and -2<x< -1 16. -2<x<2

17. -2 < x < 8 18. 2 < x < 4 19. -4 < x < 10 20. x < -4 and x> 10

21. x < -10 and x > 4

I, §3, p. 17

1. -~ 2. (2x ~ 1) 3. 0, 2, 108 4. 2z - Z2, 2w - w2

5. x # j2 or -j2. f(5) = b 6. All x. f(27) = 3

7. (a) 1 (b) 1 (c) -1 (d) -1 8. (a) 1 (b) 4 (c) 0 (d) 0

9. (a) -2 (b) -6 (c) x2+4x-2 10. x~O, 2

II. (a) odd (b) even (c) odd (d) odd

I, §4, p. 20

1. 8 and 9 2.! and -1 3. /6 and 2 4. ~ and 21/ 3 5. -h and! 6. 9 and 8

7. -! and -1 8.! and! 9. 1 and -! 10. -5:2