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Unformatted text preview: moore (jwm2685) – HW01 – gilbert – (55485) 1 This printout should have 10 questions. Multiplechoice questions may continue on the next column or page – find all choices before answering. Welcome to Quest. Print off this as signment and bring it to lectures as well as discussion groups. 001 10.0 points Determine if lim x →− 1 parenleftBig x 2 + 4 x 2 + 1 parenrightBig exists, and if it does, find its value. 1. limit = 4 2. limit does not exist 3. limit = 5 4. limit = 1 5. limit = 5 2 correct Explanation: Set f ( x ) = x 2 + 4 , g ( x ) = x 2 + 1 . Then lim x →− 1 f ( x ) = 5 , lim x →− 1 g ( x ) = 2 . Thus the limits for both the numerator and denominator exist and neither is zero; so L’Hospital’s rule does not apply. In fact, all we have to do is use properties of limits. For then we see that limit = 5 2 . 002 10.0 points When f, g, F and G are functions such that lim x → 1 f ( x ) = 0 , lim x → 1 g ( x ) = 0 , lim x → 1 F ( x ) = 2 , lim x → 1 G ( x ) = ∞ , which, if any, of A. lim x → 1 g ( x ) G ( x ) , B. lim x → 1 f ( x ) g ( x ) , C. lim x → 1 F ( x ) g ( x ) , are indeterminate forms? 1. all of them 2. A and C only 3. A and B only 4. A only correct 5. none of them 6. B only 7. B and C only 8. C only Explanation: A. Since lim x → 1 = ∞· , this limit is an indeterminate form. B. By properties of limits lim x → 1 f ( x ) g ( x ) = 0 · 0 = 0 , so this limit is not an indeterminate form. C. By properties of limits lim x → 1 F ( x ) g ( x ) = 2 = 1 , so this limit is not an indeterminate form. 003 10.0 points moore (jwm2685) – HW01 – gilbert – (55485) 2 Determine if lim x → sin − 1 (5 x ) tan − 1 (3 x ) exists, and if it does, find its value....
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This note was uploaded on 05/02/2011 for the course M 408 D taught by Professor Textbookanswers during the Spring '07 term at University of Texas.
 Spring '07
 TextbookAnswers

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