Question
1. Given the quadratic function f(x) = 2x^2+7x+3 and the linear function g(x) = x + 3, the range of the quotient function (f /
1. Given the quadratic function f(x) = 2x^2+7x+3 and the linear function g(x) = x + 3, the range of the quotient function (f / g)(x) is:
a) { y R | y - 3 }
b) { y R | y 3 }
c) { y R | -5 y 5 }
d) { y R | y 4 }
e) { y R }
f) { y R | y 7 }
g) { y R | y 5 }
h) { y R | y -6 }
i) { y R | y - 5 }
j) { y R | 3 y or y -3 }
k) None of the given intervals are representing the range of the function.
2. Which statement is always false?
a) The difference of the square of tan x and the square of sec x equals two, for all real x-values.
b) The trigonometric equation csc (x) = 2 has ONLY four solutions within the interval of (0 , 4 ).
c) The origin is the only x-intercept of the curve y = 2159 (x^4) .
d) The equation of the vertical asymptote of y = - 4 / (x + 2) is x = - 2 .
e) The solution set to the absolute value inequality |1 - 3x| 2 is (- , - 1/3 ] U [ 1 , + ) .
f) cos(- 23.5) = cos (23.5).
g) 3.1415926 radian is equivalent to about 180 degrees.
3. Which one of the following rational functions has a point of discontinuity at (p , q)? (note: p and q are real numbers.)
a) y = (x - p)(x - q) / (x - p)
b) y = (x - p)(x - q) / (x - q)
c) y = (x - p)(x - p + q) / (x - p)
d) y = (x - q)(x + p - q) / (x - q)
e) None of the given functions has such point of discontinuity.
4. What are the amplitude and the magnitude of the phase shift of the following sinusoidal function y = - 3 sin (x / 4 - /12) + 9 , respectively?
a) - 3 and /12
b) 3 and /48
c) 3 and /24
d) 3 and /12
e) 3 and / 3
f) None of the given options are correct.
g) - 3 and /48
h) - 3 and /3
i) - 3 and /24
5. Since the point A(3/2 , -2) lies on the graph of y = k sin (x - /3), then the value of k must be (-4).
a) True
b) False
6. The only solutions to a trigonometric equation on the domain 0 x 2 are x = 2 / 3 and also x = 4 / 3 . An equation that has these solutions is:
a) None of the given equations has both of the given solutions.
b) 2 cos x + 1 = 0
c) 2 sin x + 1 = 0
d) 2 cos x + 3 = 0
e) 2 sin x + 3 = 0
7. If cos(A+B) = 0.8320 and cos(A-B) = 0.4358, then the decimal value of ( cos A cos B ) correct to 4 decimal places equals:
a) 1.2678
b) 0.1981
c) 0
d) 0.3962
e) 0.6339
f) 0.3626
8. The simplified form of the expression (2) [sin( / 4 + x) - sin ( / 4 - x)] is equivalent to:
a) (-2) (sin x)
b) (2) (sin x)
c) cos (x) / 2
d) - 2 cos x
e) 2 sin x
f) (- 2) (cos x)
g) - 2 sin x
h) sin (x) / 2
i) 2 cos x
j) (2) (cos x)
9. Given csc (x) = -17 / 15, where 3/2 x 2, and cot (y) = -3 / 4, where /2 y , the value of cos(x - y) equals:
a) - 4 / 85
b) 36 / 35
c) 15 / 14
d) - 84 / 85
e) 84 / 85
f) - 15 / 14
g) 14 / 15
h) - 36 / 35
i) - 14 / 15
10. The most simplified form of the trigonometric expression ( cot(x) - cot(2x) ) equals:
a) sin(2x)
b) cos(2x)
c) tan(2x)
d) sec(2x)
e) csc(2x)
f) 1
g) 1 + sin(2x)
h) 1 - sec(2x)
i) None of the given expressions are correct.
11. The remainder of the division of the quintic function f(x)=x^52x^4+ax^3x^2+bx2 by (x+1) is 7. Also, when f(x) is divided by (x2), the remainder is 32. This means that the remainder when f(x) is divided by (x1), equals:
a) -5
b) -1
c) 0
d) 2
e) 3
f) 17
g) -2
h) -3
i) 1
j) 7
12. Does the secant value of an angle whose measure is /3 radian equals 2?
a) True
b) False
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