Problem

Find the limit. Use l'Hospital's Rule where appro…

01:10

Problem 44 Medium Difficulty

Find the limit. Use l'Hospital's Rule where appropriate. If there is a more elementary method, consider using it. If l'Hospital's Rule doesn't apply, explain why.

$ \displaystyle \lim_{x\to \infty} \sqrt{xe^{-x/2}} $

Name: find the limit use lhospitals rule where appropriate if there is a more elementary method conside 37
Uploaded: 2021-05-27
Duration: 1 min 14 s
Channel: Numerade
Description: Find the limit. Use l'Hospital's Rule where appropriate. If there is a more elementary method, consider using it. If l'Hospital's Rule doesn't apply, explain why. $ \displaystyle \lim_{x\to \infty} \sqrt{xe^{-x/2}} $

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Video Transcript

Yeah here we're going to be using we'll have to scroll to find the limit of the function. So we have the square root. Our function is the square root of X. I. M. E. To the um negative X. Over two. So we're just going to rewrite that as the spirit of acts over E. To the Extra Virgin. Um And then that's going to end up giving us since that's X over two, we can just write that as the square root of that. This whole thing is under the square root essentially he to the X. Now that we have this we can plug in infinity as our limit. We see that um that is going to be infinity over infinity. So we take the derivative of the top and bottom and then we get one over infinity. Which is just going to be the square root of zero as a result. And that's gonna give us zero as the final answer.

Carson M.

California Baptist University

Topics

Derivatives

Differentiation

Volume

Calculus: Early Transcendentals

Chapter 4

Applications of Differentiation

Section 4

Indeterminate Forms and l'Hospital's Rule

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