Getting the Horizontal Asymptotes

In summary, the conversation discusses a problem involving a function and its graph, specifically the behavior of e3x as x approaches infinity and negative infinity. The problem is to graph the function f(x)=1/(1+e3x) and determine its behavior. The conversation also mentions the preferred standard for presenting problems on the forum.
  • #1
MatthewR

Homework Statement


upload_2017-12-12_21-42-30.png


Homework Equations

The Attempt at a Solution


I understand there is no vertical asymptotes and can usually get the horizontal ,but can't understand with the exponential.
 

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  • #2
MatthewR said:

Homework Statement


View attachment 216624

Homework Equations

The Attempt at a Solution


I understand there is no vertical asymptotes and can usually get the horizontal ,but can't understand with the exponential.

Your image is fuzzy and unreadable. Take the trouble to actually type out the problem---that is actually the PF preferred standard!
 
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  • #3
Ray Vickson said:
Your image is fuzzy and unreadable. Take the trouble to actually type out the problem---that is actually the PF preferred standard!
Noted :) , here goes:

f(x)=1/1+e3x
 
  • #5
MatthewR said:
Noted :) , here goes:

f(x)=1/1+e3x
You should enclose that denominator in parentheses.
f(x)=1/(1+e3x)​

What happens to e3x as x gets very large ?

What happens to e3x as x gets very negative ?
 

Related to Getting the Horizontal Asymptotes

1. What is a horizontal asymptote?

A horizontal asymptote is a line that a function approaches but never reaches as the input values get larger or smaller. It represents the end behavior of the function.

2. How do you find the horizontal asymptote of a function?

To find the horizontal asymptote, you need to first simplify the function by factoring and cancelling out any common factors. Then, you can determine the limit of the function as x approaches positive or negative infinity. If the limit is a finite number, that is the equation for the horizontal asymptote. If the limit is infinity or negative infinity, there is no horizontal asymptote.

3. What is the difference between a horizontal asymptote and a vertical asymptote?

A horizontal asymptote represents the end behavior of a function as the input values get larger or smaller. A vertical asymptote, on the other hand, is a vertical line that the function approaches but never touches as the input values get closer to a specific value. Vertical asymptotes can occur when there is a discontinuity or a vertical tangent in the function.

4. Can a function have more than one horizontal asymptote?

Yes, a function can have multiple horizontal asymptotes. This can happen when the function has different end behavior on either side of a vertical asymptote or when the function has multiple discontinuities.

5. How can knowing the horizontal asymptote help with graphing a function?

Knowing the horizontal asymptote can help you determine the general shape and direction of a function's graph. It can also help you identify any discontinuities or vertical asymptotes. Additionally, it can be used to estimate the behavior of the function for very large or very small input values.

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