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MATH1040/7040 Mathematical Foundations I
发布时间:2022-04-08
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MATH1040/7040 Mathematical Foundations I
SECTION A (10 marks)
Each question in Section A carries the stated number of marks.
There are 10 marks available in Section A. Answers without justification will not receive full marks.
1. Determine the domain of f (x) =,x - 4. (1 mark)
2. Determine the range of g(x) = 1
(1 mark)
3. Let f (x) = (x + 3)2 and g(x) = 2x. Determine g(f (x)). (1 mark)
4. Solve for x if:
x2 + 3x - 4 = 0
5. Factorise y = 3x2 - 2x - 1.
6. Determine the number of solutions for
(1 mark)
(1 mark)
y = x2 + 1.
(1 mark)
7. Solve for x if:
3x = 4
9 .
(1 mark)
8. Solve for x if:
2 log(x) - log(x-2 ) = 2.
(1 mark)
9. Find side c for the following right-angled triangle.
(1 mark)
10. Express radians in degrees. (1 mark)
SECTION B (25 marks)
Question 1.
(a) The sum of two real numbers is equal to -1 but their product is equal to -12. Determine the
value of the two real numbers satisfying these conditions. (3 marks)
(b) You have studied at university for 1/x years and your sister will start university in x years time. You now plan to complete your dual degree in 6 years and your sister now plans to study for a Bachelor of Engineering which will take her 4 years to complete. Assuming that you both pass all your courses and complete at the same time, what is the value of x and how many years have you been studying? (3 marks)
Question 2. Sketch the graph of y = -2x2 + 4x - 3. Make sure you clearly indicate the turning point (both x- and y-coordinates) and all x- and y-intercepts (where they exist). (4 marks)
Question 3. I have deposited $4000 in a bank account which returns an interest rate of 6% per year, with interest deposited back into the bank account.
(a) If the interest compounds annually and I do not withdraw any money, how much is in my bank
account at the end of 2 years? (2 marks)
(b) If the interest compounds quarterly (every 3 months) and I do not withdraw any money, how
much is in my bank account at the end of 10 years? (2 marks)
Question 4. The population P of family of feral rabbits in rural Queensland is given by the equation P = Aekt ,
where t is in months. Initially, it was observed that the population was 450 rabbits, but after 18 months the population was found to be 1200 rabbits. Use the population equation to determine the population of rabbits 2 years after the initial population observation. (5 marks)
Question 5.
(a) Solve tan(θ) - 1 = 0, where 0 < θ < 360o . (3 marks)
(b) Consider the triangle ABC, where AB = 6 cm, AC = 14 cm and ZABC = 50. Determine BC . (3 marks)