surex1 - MAC2233 Test 1 (7 pts) 1. A function f has domain...

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Unformatted text preview: MAC2233 Test 1 (7 pts) 1. A function f has domain (-∞ , ∞ ) and a function g has domain [- 2 , ∞ ); the domain of ( f + g )( x ) is given by: A. (-∞ , ∞ ) B. (- 2 , ∞ ) C. (-∞ , ∞ ) ∪ [- 2 , ∞ ) D. [- 2 , ∞ ) E. (-∞ ,- 2) (7 pts) 2. The domain of the function h ( x ) = x +2 x 2- 9 is given by: A. (-∞ , ∞ ) B. (-∞ , 9) ∪ (9 , ∞ ) C. (-∞ ,- 9) ∪ (- 9 , ∞ ) D. (-∞ , 3) ∪ (3 , ∞ ) E. (-∞ ,- 3) ∪ (- 3 , 3) ∪ (3 , ∞ ) (7 pts) 3. If f ( x ) = x 2- 5 and g ( x ) = √ x 2 + 25, then f ( g ( x )) is equal to: A. x 2 +20 B. √ x 4- 10 x 2 + 50 C. ( x 2- 5) √ x 2 + 25 D. √ x 2 + 25- 5 E. x 4- 10 x 2 +20 (7 pts) 4. Which of the following are true? I. lim x → + ∞- 2 x 2 +3 x- 1 5 x 3- 5 x +2 = 0 II. lim t →- 2 t 2- 3 t +7 4 t 2 +2 = 2 III. lim x → + ∞- 5 x 4 +3 x- 8- 4 x 2 +2 x +2 = + ∞ IV. lim t → 1 t 2- 3 t +7 4 t 2- 3 = 5 A. only I and II B. only I and IV C. only I, II, and IV D. only I, III, and IV E. I, II, III, and IV (7 pts) 5. A demand curve is given by p = d ( x ) = 60- 2 x 2 and a supply curve is given by p = s ( x ) = x 2 + 9 x + 30 where x is the quantity demanded in thousands and p...
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This note was uploaded on 12/27/2011 for the course MAC 2233 taught by Professor Smith during the Spring '08 term at University of Florida.

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surex1 - MAC2233 Test 1 (7 pts) 1. A function f has domain...

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