Math 201-015-50 - Final Exam: Fall 2011, Exams of Algebra

The final exam questions for a university-level mathematics course, covering topics such as simplifying expressions, factoring polynomials, rationalizing denominators, long division, distance and midpoint calculations, solving equations, function operations, graphing functions, and logarithms.

Typology: Exams

2012/2013

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Math 201-015-50 - Final Exam
(Marks)
Fall 2011 Page 1 of 18
1. Simplify each expression. Your final answer must contain positive exponents only.
(a) 18a4b2c4
12ab3d32
[2]
(b)
3
27x18
9x16 ·9
x1
÷(3x)0
[2]
2. Factor the following polynomials as much as possible.
(a) 9x425y2
[2]
(b) 6a2b2+ 9ab2+ 3b2
[2]
(c) 5ax 35bx 2ay + 14by[2]
pf3
pf4
pf5
pf8
pf9
pfa
pfd
pfe
pff
pf12

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(Marks)

  1. Simplify each expression. Your final answer must contain positive exponents only.

(a)

18 a^4 b−^2 c^4 12 ab−^3 d^3

[2]

(b)

√ (^3) − 27 x 18 √ 9 x−^16

x

[2] ÷ (3x)^0

  1. Factor the following polynomials as much as possible.

[2] (a) 9x^4 − 25 y^2

[2] (b) 6a^2 b^2 + 9ab^2 + 3b^2

[2] (c) 5ax − 35 bx − 2 ay + 14by

(Marks)

  1. Perform the indicated operations and simplify.

(a)

x^2 + 5x − 24 x^2 + 6x − 16 ÷^

x^2 − 9 [3] 3 x (^2) − 6 x

(b)

x x − 2 x x − 2

− x x + 2

[3]

[2] 4. Rationalize the denominator and simplify: 9 3 +

x

(Marks) [1.5] (e) an equation of the line containing points A and B.

  1. Solve each of the following for x.

[1.5] (a) −3(x + 6) − (3x − 2) = 4

[2] (b) 6x^3 + 2x^2 = 4x

(Marks) [2] (c) (3x + 1)^2 − 2 = 0

[1.5] (d) 6 − 10 x < 9 − 2(3x + 6)

(e)

[2] x + 6 = x + 4

(Marks) [1] (b) find (g ◦ f )(x),

[1] (c) find the range of f (x),

[1] (d) find the domain of g(x),

[2] (e) find f −^1 (x), the inverse of f (x).

(Marks)

  1. Given the function g(x) = x^2 − 6 x − 16,

(a) find the vertex, the equation of the axis of symmetry, the y-intercept, and the x- [2] intercept(s),

[1] (b) find the range of g(x),

[2] (c) sketch the graph of g(x) and label all the information obtained in part (a).

(Marks)

  1. Given the function f (x) =

−x^2 + 5 if x ≤ 3 3 x − 10 if x > 3

[1] (a) find f (7),

[2] (b) sketch the graph of f (x),

[1] (c) find the domain and the range of f (x).

(Marks)

  1. Given the function y = −4 + 2x,

[2] (a) graph the function,

[1] (b) find the domain and range of f (x),

[2] (c) find the coordinates of x and y-intercepts, and the equation of the asymptote.

(Marks) [2] 15. Simplify:

e2 ln 5^ + ln

√^1

e

  1. Solve each of the following equations for x:

[2] (a) 2x^2 −x^ = (0.5)−^3 −x

[2] (b) ex−^5 = 2

(Marks) [2] (c) log 3 (x + 16) − log 3 x = 2

[1] 17. If $25, 000 is invested at 4% interest compounded quarterly, what will the value of the invest- ment be after 10 years? (Round your answer to the nearest dollar.)

  1. If sec θ =

[2] 2 where θ is an acute angle, find sin θ and cot θ.

(Marks)

(b) tan^ y^ + cot^ y csc y

[2] = sec y

[2] 22. Find the side x to two decimal places.

25 ◦^3. 5

x

[2] 23. Find the angle x.

x◦^7

(Marks) [2] 24. Find the exact value of csc 480◦.

[2] 25. Find the amplitude and period of f (x) = 2 cos(2x), then sketch two cycles of f (x).