A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 4 years ago
How do I use the hospital rule to solve this limit?
lim x> infinity ( (2^x2^(x)) / 2^x+2^(x) )
anonymous
 4 years ago
How do I use the hospital rule to solve this limit? lim x> infinity ( (2^x2^(x)) / 2^x+2^(x) )

This Question is Closed

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0dw:1354999747553:dw

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0\[\frac{d}{dx} 2^x=\ln(2)2^x\] So I'm not sure how much it'll end up helping.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Your equation is\[\lim_{x \rightarrow \infty}\frac{ 2^{x}2^{x} }{ 2^{x}+2^{x} }\]? L'Hopital's Rule says that if \[\lim_{x \rightarrow c}f(x)=\lim_{x \rightarrow c}g(x)=0or \pm \infty\]and if\[\lim_{x \rightarrow c}\frac{ f'(x) }{ g'(x) }\]where g'(x) =/= 0 for all x in the domain (basically if the bottom isn't going to be 0) then\[\lim_{x \rightarrow c}\frac{ f(x) }{ g(x) }=\lim_{x \rightarrow c}\frac{ f'(x) }{ g'(x) }\]So the first thing you want to do is take \[\lim_{x \rightarrow \infty}2 ^{x}2^{x}\]and\[\lim_{x \rightarrow \infty}2^{x}+2^{x}\]and see what they are. If they're both 0 or + infinity, then you can use the rule. Take the derivative of the top and then take the derivative of the bottom, and then take the limit of the whole thing and see what you get. I'll stick around if you need help with any of that.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0The biggest thing that'll help is that \[\ln 2 \times 2^{x}+\ln 2 \times2^{x}=2 \times \ln 2 \times \cosh(\ln2 \times x)\]and\[\ln 2 \times 2^{x}\ln 2 \times2^{x}=2 \times \ln 2 \times \sinh(\ln2 \times x)\]
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.