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Форум » Форум » Форум Лилианны » MATH 115 Quiz 4 (Liberty University) x
MATH 115 Quiz 4 (Liberty University) x
ShannqnrefДата: Среда, 20.01.2016, 07:54 | Сообщение # 1
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1. How many x intercepts does the graph of the function f(x) = x3+ 4 have? A. 0 B. 1 C. 2 D. 3 2. If Logb(5) = c, then b4c= A. 4 B. 5 C. 25 D. 625 3. How many points of intersection do the graphs of the functions f(x) = x2and g(x) = 2xhave? A. 1 B. 2 C. 3 D. 4 4. The range of the function f(x) = -x2+ 2x – 5 is given by A. (0 , infity) B. (-infinity , 4 - C. (-infinity , -4 - D. (-infinity , -5 - 5. Which of these functions does not have an inverse? A. f(x) = |x – 5| B. h(x) = 2x – 9 C. k(x) = ln(- x + 4) D. j(x) = x1/3 6. The solution set of the inequality (x + 5)4(x + 3) ≥ 0 is given by interval A. [-3 , infinity) B. -5 U [-3 , infinity) C. (-infinity , infinity) D. (-3 , infinity) 7. The range of the function h(x) = -|x – 5| – 2 is give by A. (-infinity , 0) B. (-infinity , -2) C. (-infinity , -2 - D. (-infinity , 2 - 8. 5 ln e2– 2 ln (7e) + ln 49 = A. 8 B. 3 C. 4 ln 7 D. 8e – 4 ln 7 9. If f(x) = x / (- x + 4) and g(x) = 2x + 2, then (f0g)(1) = A. 4/3 B. 4 1/3 C. 4 D. undefined 10.√(x2+ 6x + 9) = A. x + √(6x) + 3 B. x + 3 C. |x + 3| D. (x + 3)2 11.If f(x) = x2+ 1 for x ≤ 0, then f-1(x) = A. x -1 B. √(x – 1) C. √(x + 1) D. – √(x – 1) 12.The domain of f(x) = ln(2 – x) + ln(3 – x) is given by A. (-infinity , 2) B. (2 , 3) C. (-infinity , 3) D. (-infinity , 2 - 13.The solution set of the inequality (x – 1)2≤ 0 is given by A. (-infinity , infinity) B. (-infinity , 1 - C. 1 D. [1 , infinity) 14.The solution to the equation 2 (4x+1) = 4 (8x + 2) A. -5 B. 1 C. 0 D. no solution 15.The number of solutions of the equation | – x2+ 4x + 1 | = 5 is equal to A. 1 B. 2 C. 3 D. 4 16.Using the absolute value concept, the statement The distance from x to -6 is not less than 7 may be written as follows A. |x + 6| ≥ 7 B. |x + 6| >


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