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RED DO NOT WRITE ON THIS EXAM Math 110 Final Exam All Sections including SL Center April 18-‐23, 2014 Do not write on this exam.
1. What is the domain of the function defined by the equation 𝑦 = !!! !
!!!!!!!!?
(a) All real numbers 𝑥, 𝑥 ≠ −1, 𝑥 ≠ 0, 𝑥 ≠ 1. (b) All real numbers 𝑥, 𝑥 ≠ 0, 𝑥 ≠ 1. (c) All real numbers 𝑥, 𝑥 ≠ −1, 𝑥 ≠ 0. (d) All real numbers 𝑥, 𝑥 ≠ 0. (e) All real numbers.
2. If 𝑏 and 𝑐 are real numbers so that the polynomial 𝑥! + 𝑏𝑥 + 𝑐 has 2 − 3𝑖 as a zero, find 𝑏 + 𝑐.
(a) 8 (b) −8 (c) 9 (d) −9 (e) 10 (f) −10
3. Let 𝑅 𝑥 = !!!!!!!!!!!!!!!!!!
. Find all asymptotes for 𝑅(𝑥). (a) 𝑦 = 3𝑥 (b) 𝑦 = 3𝑥 − 1 (c) 𝑦 = 3𝑥 − 2 (d) 𝑦 = 3𝑥 − 3 (e) 𝑦 = 3𝑥 − 4 (f) 𝑦 = 3𝑥 − 5
4. Solve the inequality: !!!!!!!
≥ 0.
(a) −1,0 ∪ 2,∞ (b) [−1,0] ∪ (2,∞) (c) −1,2 (d) −∞,−1 ∪ 0 ∪ 2,∞ (e) −1,0 (f) −∞,∞
5. Solve the inequality: !!!
!!!!≥ 1.
(a) −∞,− !!∪ (0,∞) (b) −∞,− !
!∪ [0,∞) (c) [− !
!, 0) (d) − !
!, 0 (e) − !
!, 0
6. Find 𝑘 so that (𝑥 + 2) is a factor of 𝑥!"" + 8𝑥!" − 3𝑥! − 5𝑥 + 𝑘 .
(a) −3 (b) −2 (c) −1 (d) 1 (e) 2 (f) 3
7. How many zeros of the polynomial 𝑝 𝑥 = 4𝑥! + 8𝑥! + 3𝑥! − 2𝑥 − 1 are positive? (a) 0 (b) 1 (c) 2 (d) 3 (e) 4 (f) 5
8. Given 𝑥 = 1 + 𝑖 is a solution to 𝑥! − 4𝑥! + 4𝑥! − 4 = 0. The real solutions to this equation are 𝑥 = 1 ± 𝑏 where 𝑏 = (a) 2 (b) 3 (c) 4 (d) 5 (e) 6 (f) 7
9. Find the domain of the function 𝑓 𝑥 = 𝑥 − !!.
(a) −1,0 ∪ (1,∞) (b) −1,0 ∪ [1,∞) (c) 𝑥 ≠ 0 (d) (1,∞) (e) (−1,0)
10. Consider the function 𝑓 𝑥 = !!!!!!
. If 𝑔 is the inverse function to 𝑓, then 𝑔 5 = (a) 1 (b) 2 (c) 3 (d) 4 (e) 5 (f) 6
11. If 𝑥 is a solution to 9!!!! = 27! , then 𝑥 lies between (a) 0 and 1 (b) 1 and 2 (c) 2 and 3 (d) 3 and 4 (e) 4 and 5 (f) 5 and 6
12. Find log!(6 3) − log! 2. (a) !
! (b) !
! (c) !
! (d) !
! (e) !
! (f) !!
!
13. Select the function that best describes the given graph.
(a) 𝑓 𝑥 = ln 𝑥 − 2 + 1 (b) 𝑓 𝑥 = ln 𝑥 − 1 + 2 (c) 𝑓 𝑥 = ln 𝑥 + 1 + 1 (d) 𝑓 𝑥 = ln 𝑥 + 2 + 2 (e) 𝑓 𝑥 = ln 𝑥 + 2 + 1
14. log! 500 is between (a) 0 and 1 (b) 1 and 2 (c) 2 and 3 (d) 3 and 4 (e) 4 and 5 (f) 5 and 6
15. Use properties of logarithms to find the exact value of the expression log! 7 ⋅ log! 25 ⋅ log! 3 ⋅ 𝑙𝑜𝑔!8
(a) 1 (b) 2 (c) 3 (d) 4 (e) 5 (f) 6
16. Recall that “log” means logarithm base 10. If 𝑎 = log 2 and 𝑏 = log 7, write log 35 in terms of 𝑎 and 𝑏. (a) 1 + 𝑎 + 𝑏 (b) 1 + 𝑎 − 𝑏 (c) 1 − 𝑎 + 𝑏 (d) 1 − 𝑎 − 𝑏 (e) 1 + 2𝑎 + 𝑏 (f) 1 − 2𝑎 − 𝑏
17. How many years would it take an amount of money to double if it is invested at 20% compounded continuously? (a) ln 2 (b) 2 ln 2 (c) 3 ln 2 (d) 4 ln 2 (e) 5 ln 2 (f) 2 ln 5
18. Find the foci for the given ellipse. (a) (−1,1) and (3,1) (b) (−1 − 3, 1) and (−1 + 3, ,1) (c) −1 − 5, 1 and −1 + 5, ,1 (d) (1 − 3, 1) and (1 + 3, 1) (e) 1 − 5, 1 and 1 + 5, 1
19. Which of the following conics is represented by the equation 𝑥! + 𝑦! + 4𝑥 − 2𝑦 = 2𝑥! + 2𝑦 + 2? (a) circle (b) ellipse (c) parabola (d) hyperbola (e) None of these
20. Find the center of the hyperbola 𝑥! − 𝑦! + 4𝑥 − 2𝑦 = 1. (a) (2,1) (b) (2,−1) (c) (−2,1) (d) (−2,−1) (e) (1,2) (f) (2,1)
21. Solve the system of equations for 𝑥.
3𝑥 + 2𝑦 + 𝑧 = 14𝑥 + 2𝑦 + 𝑧 = 4𝑥 + 𝑦 + 2𝑧 = 6
(a) 𝑥 = 1 (b) 𝑥 = 2 (c) 𝑥 = 3 (d) 𝑥 = 4 (e) 𝑥 = 5 (f) 𝑥 = 6
22. If !!!!!!!!!!
= !!!!
+ !!!!!
, then what is the value of 𝐴? (a) 𝐴 = 1 (b) 𝐴 = −1 (c) 𝐴 = 0 (d) 𝐴 = 2 (e) 𝐴 = −2 (f) 𝐴 = 3
23. If 𝑆 = 16 + 21 + 26 + 31 +⋯+ 1011 is an arithmetic sum, then what is true about 𝑆? (a) 𝑆 < 100,000 (b) 100,000 < 𝑆 < 200,000 (c) 200,000 < 𝑆 < 300,000 (d) 300,000 < 𝑆 < 400,000 (e) 𝑆 > 400,000
2
5
4
2
–2
5
24. Writhe 2. 18 as a fraction in simplest form.
(a) !"! (b) !"
!! (c) !"
!! (d) !"!
!! (e) !"#
!!
25. Find the coefficient of 𝑥! in the expansion of 𝑥 − 1 !!.
(a) −9702 (b) 9702 (c) −4851 (d) 4851 (e) −99 (f) 99
26. Find the coefficient of 𝑥! in the expansion of 𝑥! − !!!
!.
(a) 1 (b) −1 (c) 5 (d) −5 (e) 10 (f) −10
27. A coed soccer team has 9 girls and 8 boys. How many was can you choose a team of 6 girls and 5 boys? (a) less than 500 (b) between 500 and 1,000 (c) between 1,000 and 5,000 (d) between 5,000 and 10,000 (e) over 10,000
28. How many different words (with or without meaning) can be made by rearranging the letters in the word 𝑝𝑜𝑠𝑠𝑒𝑠𝑠𝑖𝑜𝑛? (a) less than 1,000 (b) between 1,000 and 10,000 (c) between 10,000 and 100,000 (d) between 100,000 and 1,000,000 (e) over 1,000,000
29. A pair of fair dice is rolled. What is the probability that the sum of the numbers is 10 or more? (a) !
! (b) !
! (c) !
! (d) !
! (e) !
! (f) !
!
30. Three people randomly choose one of eight flavors of ice cream. The probability that at least two of them choose the same flavor is closest to (a) 0.22 (b) 0.33 (c) 0.44 (d) 0.55 (e) 0.66 (f) 0.77
1. b 2. c 3. f 4. a 5. d 6. e 7. b 8. b 9. b 10. f 11. a 12. b 13. c 14. d 15. f 16. c 17. e 18. e 19. d 20. d 21. e 22. a 23. b 24. b 25. c 26. d 27. c 28. c 29. b 30. b