Luttrell 2012
161
Answer Key, appendix
A-6a
2. -49
6. 216x
3
7. 4x
4
8. 4.5x
4
10. -1 – 2i
12. -2i
A-6b
2. log 8/3
3. log 86.4
4. 2log x + 3log y – log z
6. log x + log(x+1)
7. ln5/ln10
8. ln6/ln2
10. 5/6
11. 2005
12. ⅓
13. 0
15. 3
16. 3
17. ⅔
18. 1
A-6c
1. 3
2. 2
4. log 144
6. (log
3
2, 4)
7. 6
8. 3
10. no
12. y = log
3
x
14. No
15. no
A-7
1. 36x
2
+ 60x + 25
2. x
3
- 3x
2
y + 3xy
2
- y
3
3. 4x
2
+ 16x + 16
4. (x – 9)(x + 3)
5. (3x + 4)(4x + 3)
6. 7(a
2
– 2b)(a
2
+ 2b0
7. (3x – 2y
3
)(3x + 2y
3
)
9. y(4x – 3)(1 – 2y)
10. -1
13. {-1, 3.5}
14. {3}
15. {0, -0.2}
18. Removable at x = -2; non-removable at x = -3
19. Removable at x = -1
A-8
1. x ≤ 3
2. y ≤ 4
3. -1
4. (3,4)
6. 10
8. -2
9. 1
A-9
2. pairs; conjugates
3. (x – 2)(x + 2)(x – 1)
4. (x – 1)(5x
2
+2x – 6)
5. (x
2
+ 1)(x + 3)(x - 2)
6. Two positive and two negative zeroes
Final Exam:
You can always email me if you need my answers. I might use this exam again in the future…
