hw15 - Granillo, Yvette Homework 15 Due: Dec 9 2005, 3:00...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Granillo, Yvette – Homework 15 – Due: Dec 9 2005, 3:00 am – Inst: Edward Odell 1 This print-out should have 22 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. The due time is Central time. 001 (part 1 oF 1) 10 points When f, g, F and G are Functions such that lim x 1 f ( x ) = 0 , lim x 1 g ( x ) = , 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 g ( x ) f ( x ) , C. lim x 1 f ( x ) F ( x ) g ( x ) , are indeterminate Forms? 1. B and C only 2. all oF them 3. B only 4. A and B only 5. C only 6. A only correct 7. A and C only 8. none oF them Explanation: A. Since lim x 1 g ( x ) G ( x ) = , this limit is an indeterminate Form. B. By properties oF limits, lim x 1 g ( x ) f ( x ) = 0 = , so this limit is not an indeterminate Form. C. By properties oF limits, lim x 1 f ( x ) F ( x ) g ( x ) = 0 · 2 = 0 , so this limit is not an indeterminate Form. keywords: Stewart5e, 002 (part 1 oF 1) 10 points When f, g, F and G are Functions such that lim x 2 f ( x ) = 0 , lim x 2 g ( x ) = 1 , lim x 2 F ( x ) = 2 , lim x 2 G ( x ) = , which oF the Following is an indeterminate Form? 1. lim x 2 F ( x ) G ( x ) 2. lim x 2 F ( x ) f ( x ) 3. lim x 2 g ( x ) G ( x ) correct 4. lim x 2 f ( x ) g ( x ) 5. lim x 2 g ( x ) F ( x ) Explanation: Since lim x 2 g ( x ) G ( x ) = 1 , lim x 2 F ( x ) G ( x ) = 2 , lim x 2 f ( x ) g ( x ) = 0 1 , lim x 2 g ( x ) F ( x ) = 1 2 , lim x 2 F ( x ) f ( x ) = 2 0 ,
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Granillo, Yvette – Homework 15 – Due: Dec 9 2005, 3:00 am – Inst: Edward Odell 2 we see that only lim x 2 g ( x ) G ( x ) is an indeterminate form. keywords: Stewart5e, 003 (part 1 of 1) 10 points Determine the value of lim x →∞ x x 2 + 1 . 1. limit = 4 2. limit = 1 4 3. limit = 1 correct 4. limit = 1 2 5. limit = 0 6. limit = 2 7. limit = Explanation: Since lim x →∞ x x 2 + 1 , the limit is of indeterminate form. We might Frst try to use L’Hospital’s Rule lim x →∞ f ( x ) g ( x ) = lim x →∞ f 0 ( x ) g 0 ( x ) with f ( x ) = x, g ( x ) = p x 2 + 1 to evaluate the limit. But f 0 ( x ) = 1 , g 0 ( x ) = x x 2 + 1 , so lim x →∞ f 0 ( x ) g 0 ( x ) = lim x →∞ x 2 + 1 x = , which is again of indeterminate form. Let’s try using L’Hospital’s Rule again but now with f ( x ) = p x 2 + 1 , g ( x ) = x, and f 0 ( x ) = x x 2 + 1 , g 0 ( x ) = 1 . In this case, lim x →∞ x 2 + 1 x = lim x →∞ x x 2 + 1 , which is the limit we started with. So, this is an example where L’Hospital’s Rule applies, but doesn’t work! We have to go back to algebraic methods:
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 12

hw15 - Granillo, Yvette Homework 15 Due: Dec 9 2005, 3:00...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online