Infinite amount of vertical asymptotes












0














Is it possible that the graph of function has infinitely many vertical asymptotes?



I suppose, that it is not possible, because such function would not exist. But I need to prove it in a math-fashioned-way, and I'm clueless how to do it.



Help would be appreciated. :) Thanks.










share|cite|improve this question


















  • 5




    $tan x{}{}{}{}$.
    – TonyK
    Nov 24 at 14:24










  • Oh yes, that indeed has infinitely many asymptotes. Still, how do I prove that in a math-way?
    – weno
    Nov 24 at 14:30






  • 1




    We can even have the asymptotes accumulate in the finite. $f(x)=sum_nfrac1{(nx-1)2^n}$ has a definition gap with vertical asymptote at all $frac 1n$, while it is defined (i.e., converges) everywhere else
    – Hagen von Eitzen
    Nov 24 at 14:31






  • 1




    @weno I'd say that TonyK's comment is a "math-way" proof of the claim
    – Hagen von Eitzen
    Nov 24 at 14:31












  • @HagenvonEitzen Do I simply answer the question with "yes, because for example f(x) = tan x has infinitely many vertical asymptotes"?
    – weno
    Nov 24 at 14:36
















0














Is it possible that the graph of function has infinitely many vertical asymptotes?



I suppose, that it is not possible, because such function would not exist. But I need to prove it in a math-fashioned-way, and I'm clueless how to do it.



Help would be appreciated. :) Thanks.










share|cite|improve this question


















  • 5




    $tan x{}{}{}{}$.
    – TonyK
    Nov 24 at 14:24










  • Oh yes, that indeed has infinitely many asymptotes. Still, how do I prove that in a math-way?
    – weno
    Nov 24 at 14:30






  • 1




    We can even have the asymptotes accumulate in the finite. $f(x)=sum_nfrac1{(nx-1)2^n}$ has a definition gap with vertical asymptote at all $frac 1n$, while it is defined (i.e., converges) everywhere else
    – Hagen von Eitzen
    Nov 24 at 14:31






  • 1




    @weno I'd say that TonyK's comment is a "math-way" proof of the claim
    – Hagen von Eitzen
    Nov 24 at 14:31












  • @HagenvonEitzen Do I simply answer the question with "yes, because for example f(x) = tan x has infinitely many vertical asymptotes"?
    – weno
    Nov 24 at 14:36














0












0








0







Is it possible that the graph of function has infinitely many vertical asymptotes?



I suppose, that it is not possible, because such function would not exist. But I need to prove it in a math-fashioned-way, and I'm clueless how to do it.



Help would be appreciated. :) Thanks.










share|cite|improve this question













Is it possible that the graph of function has infinitely many vertical asymptotes?



I suppose, that it is not possible, because such function would not exist. But I need to prove it in a math-fashioned-way, and I'm clueless how to do it.



Help would be appreciated. :) Thanks.







limits graphing-functions






share|cite|improve this question













share|cite|improve this question











share|cite|improve this question




share|cite|improve this question










asked Nov 24 at 14:22









weno

817




817








  • 5




    $tan x{}{}{}{}$.
    – TonyK
    Nov 24 at 14:24










  • Oh yes, that indeed has infinitely many asymptotes. Still, how do I prove that in a math-way?
    – weno
    Nov 24 at 14:30






  • 1




    We can even have the asymptotes accumulate in the finite. $f(x)=sum_nfrac1{(nx-1)2^n}$ has a definition gap with vertical asymptote at all $frac 1n$, while it is defined (i.e., converges) everywhere else
    – Hagen von Eitzen
    Nov 24 at 14:31






  • 1




    @weno I'd say that TonyK's comment is a "math-way" proof of the claim
    – Hagen von Eitzen
    Nov 24 at 14:31












  • @HagenvonEitzen Do I simply answer the question with "yes, because for example f(x) = tan x has infinitely many vertical asymptotes"?
    – weno
    Nov 24 at 14:36














  • 5




    $tan x{}{}{}{}$.
    – TonyK
    Nov 24 at 14:24










  • Oh yes, that indeed has infinitely many asymptotes. Still, how do I prove that in a math-way?
    – weno
    Nov 24 at 14:30






  • 1




    We can even have the asymptotes accumulate in the finite. $f(x)=sum_nfrac1{(nx-1)2^n}$ has a definition gap with vertical asymptote at all $frac 1n$, while it is defined (i.e., converges) everywhere else
    – Hagen von Eitzen
    Nov 24 at 14:31






  • 1




    @weno I'd say that TonyK's comment is a "math-way" proof of the claim
    – Hagen von Eitzen
    Nov 24 at 14:31












  • @HagenvonEitzen Do I simply answer the question with "yes, because for example f(x) = tan x has infinitely many vertical asymptotes"?
    – weno
    Nov 24 at 14:36








5




5




$tan x{}{}{}{}$.
– TonyK
Nov 24 at 14:24




$tan x{}{}{}{}$.
– TonyK
Nov 24 at 14:24












Oh yes, that indeed has infinitely many asymptotes. Still, how do I prove that in a math-way?
– weno
Nov 24 at 14:30




Oh yes, that indeed has infinitely many asymptotes. Still, how do I prove that in a math-way?
– weno
Nov 24 at 14:30




1




1




We can even have the asymptotes accumulate in the finite. $f(x)=sum_nfrac1{(nx-1)2^n}$ has a definition gap with vertical asymptote at all $frac 1n$, while it is defined (i.e., converges) everywhere else
– Hagen von Eitzen
Nov 24 at 14:31




We can even have the asymptotes accumulate in the finite. $f(x)=sum_nfrac1{(nx-1)2^n}$ has a definition gap with vertical asymptote at all $frac 1n$, while it is defined (i.e., converges) everywhere else
– Hagen von Eitzen
Nov 24 at 14:31




1




1




@weno I'd say that TonyK's comment is a "math-way" proof of the claim
– Hagen von Eitzen
Nov 24 at 14:31






@weno I'd say that TonyK's comment is a "math-way" proof of the claim
– Hagen von Eitzen
Nov 24 at 14:31














@HagenvonEitzen Do I simply answer the question with "yes, because for example f(x) = tan x has infinitely many vertical asymptotes"?
– weno
Nov 24 at 14:36




@HagenvonEitzen Do I simply answer the question with "yes, because for example f(x) = tan x has infinitely many vertical asymptotes"?
– weno
Nov 24 at 14:36










1 Answer
1






active

oldest

votes


















0














Generally, a function has a vertical asymptote at $x$ when it can be expressed as: $f(x)=frac{a}{g(x)}mid aneq g(x)$ and $g(x)=0$, the simplest example of which is $frac{1}{x}$.



For a function to have infinitely many vertical asymptotes there must be infinitely many values of $x$ for which $g(x)=0$. There are two ways this can happen:



(1.) $g(x)$ is periodic with infinitely many zeros - i.e.
$$f(x)=ufrac{1}{per(x)}mid per:=sin,cos,tan,mod,ldots,etc.$$
(2.) $f(x)$ is a sum or product of an infinite series.



The latter case is pretty much the same as the former, as most (if not all) such infinite series have a closed form solution equivalent to (1.), for example:
$$sum_{n=0}^infty(-1)^nfrac{(2n+1)!}{x^{2n+1}}$$ is just the inverse of the Taylor series for the $sin$ function.



As TonK commented, $tan{x}$ is a straightforward example. You could also use $frac{u}{sin{x}}$, $frac{u}{cos{x}}$, $Gamma(x)$, etc.






share|cite|improve this answer





















  • Hello, thanks for sending this! I have one question though. :) In the first sentence, did you mean that g(x) = 0 or g(x) =/= 0? :) Confused here.
    – weno
    Nov 24 at 19:51










  • I have one more question: what is the $ u $ in the first example?
    – weno
    Nov 24 at 19:54










  • I did mean $g(x)=0$, basically, this is why you're not supposed to divide by 0, and why some people claim that $1/0=infty$. As for $u$, it can be whatever you want it to be - a constant, another function of $x$ - as long as it isn't equal to whatever's in the denominator (because then $f(x)$ would be 1).
    – R. Burton
    Nov 24 at 21:03












  • This answer is terribly muddled! "There are two ways this can happen"? Where did that come from?
    – TonyK
    Nov 26 at 0:23










  • Generally, any problem involving an infinite amount of something can be solved using an infinite series. There are two ways because it is intuitively obvious that $tan{x}$ has infinitely many vertical asymptotes, but arbitrarily complicated functions can be built using infinite sums.
    – R. Burton
    Nov 26 at 4:13











Your Answer





StackExchange.ifUsing("editor", function () {
return StackExchange.using("mathjaxEditing", function () {
StackExchange.MarkdownEditor.creationCallbacks.add(function (editor, postfix) {
StackExchange.mathjaxEditing.prepareWmdForMathJax(editor, postfix, [["$", "$"], ["\\(","\\)"]]);
});
});
}, "mathjax-editing");

StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "69"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});

function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
noCode: true, onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});


}
});














draft saved

draft discarded


















StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fmath.stackexchange.com%2fquestions%2f3011611%2finfinite-amount-of-vertical-asymptotes%23new-answer', 'question_page');
}
);

Post as a guest















Required, but never shown

























1 Answer
1






active

oldest

votes








1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes









0














Generally, a function has a vertical asymptote at $x$ when it can be expressed as: $f(x)=frac{a}{g(x)}mid aneq g(x)$ and $g(x)=0$, the simplest example of which is $frac{1}{x}$.



For a function to have infinitely many vertical asymptotes there must be infinitely many values of $x$ for which $g(x)=0$. There are two ways this can happen:



(1.) $g(x)$ is periodic with infinitely many zeros - i.e.
$$f(x)=ufrac{1}{per(x)}mid per:=sin,cos,tan,mod,ldots,etc.$$
(2.) $f(x)$ is a sum or product of an infinite series.



The latter case is pretty much the same as the former, as most (if not all) such infinite series have a closed form solution equivalent to (1.), for example:
$$sum_{n=0}^infty(-1)^nfrac{(2n+1)!}{x^{2n+1}}$$ is just the inverse of the Taylor series for the $sin$ function.



As TonK commented, $tan{x}$ is a straightforward example. You could also use $frac{u}{sin{x}}$, $frac{u}{cos{x}}$, $Gamma(x)$, etc.






share|cite|improve this answer





















  • Hello, thanks for sending this! I have one question though. :) In the first sentence, did you mean that g(x) = 0 or g(x) =/= 0? :) Confused here.
    – weno
    Nov 24 at 19:51










  • I have one more question: what is the $ u $ in the first example?
    – weno
    Nov 24 at 19:54










  • I did mean $g(x)=0$, basically, this is why you're not supposed to divide by 0, and why some people claim that $1/0=infty$. As for $u$, it can be whatever you want it to be - a constant, another function of $x$ - as long as it isn't equal to whatever's in the denominator (because then $f(x)$ would be 1).
    – R. Burton
    Nov 24 at 21:03












  • This answer is terribly muddled! "There are two ways this can happen"? Where did that come from?
    – TonyK
    Nov 26 at 0:23










  • Generally, any problem involving an infinite amount of something can be solved using an infinite series. There are two ways because it is intuitively obvious that $tan{x}$ has infinitely many vertical asymptotes, but arbitrarily complicated functions can be built using infinite sums.
    – R. Burton
    Nov 26 at 4:13
















0














Generally, a function has a vertical asymptote at $x$ when it can be expressed as: $f(x)=frac{a}{g(x)}mid aneq g(x)$ and $g(x)=0$, the simplest example of which is $frac{1}{x}$.



For a function to have infinitely many vertical asymptotes there must be infinitely many values of $x$ for which $g(x)=0$. There are two ways this can happen:



(1.) $g(x)$ is periodic with infinitely many zeros - i.e.
$$f(x)=ufrac{1}{per(x)}mid per:=sin,cos,tan,mod,ldots,etc.$$
(2.) $f(x)$ is a sum or product of an infinite series.



The latter case is pretty much the same as the former, as most (if not all) such infinite series have a closed form solution equivalent to (1.), for example:
$$sum_{n=0}^infty(-1)^nfrac{(2n+1)!}{x^{2n+1}}$$ is just the inverse of the Taylor series for the $sin$ function.



As TonK commented, $tan{x}$ is a straightforward example. You could also use $frac{u}{sin{x}}$, $frac{u}{cos{x}}$, $Gamma(x)$, etc.






share|cite|improve this answer





















  • Hello, thanks for sending this! I have one question though. :) In the first sentence, did you mean that g(x) = 0 or g(x) =/= 0? :) Confused here.
    – weno
    Nov 24 at 19:51










  • I have one more question: what is the $ u $ in the first example?
    – weno
    Nov 24 at 19:54










  • I did mean $g(x)=0$, basically, this is why you're not supposed to divide by 0, and why some people claim that $1/0=infty$. As for $u$, it can be whatever you want it to be - a constant, another function of $x$ - as long as it isn't equal to whatever's in the denominator (because then $f(x)$ would be 1).
    – R. Burton
    Nov 24 at 21:03












  • This answer is terribly muddled! "There are two ways this can happen"? Where did that come from?
    – TonyK
    Nov 26 at 0:23










  • Generally, any problem involving an infinite amount of something can be solved using an infinite series. There are two ways because it is intuitively obvious that $tan{x}$ has infinitely many vertical asymptotes, but arbitrarily complicated functions can be built using infinite sums.
    – R. Burton
    Nov 26 at 4:13














0












0








0






Generally, a function has a vertical asymptote at $x$ when it can be expressed as: $f(x)=frac{a}{g(x)}mid aneq g(x)$ and $g(x)=0$, the simplest example of which is $frac{1}{x}$.



For a function to have infinitely many vertical asymptotes there must be infinitely many values of $x$ for which $g(x)=0$. There are two ways this can happen:



(1.) $g(x)$ is periodic with infinitely many zeros - i.e.
$$f(x)=ufrac{1}{per(x)}mid per:=sin,cos,tan,mod,ldots,etc.$$
(2.) $f(x)$ is a sum or product of an infinite series.



The latter case is pretty much the same as the former, as most (if not all) such infinite series have a closed form solution equivalent to (1.), for example:
$$sum_{n=0}^infty(-1)^nfrac{(2n+1)!}{x^{2n+1}}$$ is just the inverse of the Taylor series for the $sin$ function.



As TonK commented, $tan{x}$ is a straightforward example. You could also use $frac{u}{sin{x}}$, $frac{u}{cos{x}}$, $Gamma(x)$, etc.






share|cite|improve this answer












Generally, a function has a vertical asymptote at $x$ when it can be expressed as: $f(x)=frac{a}{g(x)}mid aneq g(x)$ and $g(x)=0$, the simplest example of which is $frac{1}{x}$.



For a function to have infinitely many vertical asymptotes there must be infinitely many values of $x$ for which $g(x)=0$. There are two ways this can happen:



(1.) $g(x)$ is periodic with infinitely many zeros - i.e.
$$f(x)=ufrac{1}{per(x)}mid per:=sin,cos,tan,mod,ldots,etc.$$
(2.) $f(x)$ is a sum or product of an infinite series.



The latter case is pretty much the same as the former, as most (if not all) such infinite series have a closed form solution equivalent to (1.), for example:
$$sum_{n=0}^infty(-1)^nfrac{(2n+1)!}{x^{2n+1}}$$ is just the inverse of the Taylor series for the $sin$ function.



As TonK commented, $tan{x}$ is a straightforward example. You could also use $frac{u}{sin{x}}$, $frac{u}{cos{x}}$, $Gamma(x)$, etc.







share|cite|improve this answer












share|cite|improve this answer



share|cite|improve this answer










answered Nov 24 at 15:15









R. Burton

32919




32919












  • Hello, thanks for sending this! I have one question though. :) In the first sentence, did you mean that g(x) = 0 or g(x) =/= 0? :) Confused here.
    – weno
    Nov 24 at 19:51










  • I have one more question: what is the $ u $ in the first example?
    – weno
    Nov 24 at 19:54










  • I did mean $g(x)=0$, basically, this is why you're not supposed to divide by 0, and why some people claim that $1/0=infty$. As for $u$, it can be whatever you want it to be - a constant, another function of $x$ - as long as it isn't equal to whatever's in the denominator (because then $f(x)$ would be 1).
    – R. Burton
    Nov 24 at 21:03












  • This answer is terribly muddled! "There are two ways this can happen"? Where did that come from?
    – TonyK
    Nov 26 at 0:23










  • Generally, any problem involving an infinite amount of something can be solved using an infinite series. There are two ways because it is intuitively obvious that $tan{x}$ has infinitely many vertical asymptotes, but arbitrarily complicated functions can be built using infinite sums.
    – R. Burton
    Nov 26 at 4:13


















  • Hello, thanks for sending this! I have one question though. :) In the first sentence, did you mean that g(x) = 0 or g(x) =/= 0? :) Confused here.
    – weno
    Nov 24 at 19:51










  • I have one more question: what is the $ u $ in the first example?
    – weno
    Nov 24 at 19:54










  • I did mean $g(x)=0$, basically, this is why you're not supposed to divide by 0, and why some people claim that $1/0=infty$. As for $u$, it can be whatever you want it to be - a constant, another function of $x$ - as long as it isn't equal to whatever's in the denominator (because then $f(x)$ would be 1).
    – R. Burton
    Nov 24 at 21:03












  • This answer is terribly muddled! "There are two ways this can happen"? Where did that come from?
    – TonyK
    Nov 26 at 0:23










  • Generally, any problem involving an infinite amount of something can be solved using an infinite series. There are two ways because it is intuitively obvious that $tan{x}$ has infinitely many vertical asymptotes, but arbitrarily complicated functions can be built using infinite sums.
    – R. Burton
    Nov 26 at 4:13
















Hello, thanks for sending this! I have one question though. :) In the first sentence, did you mean that g(x) = 0 or g(x) =/= 0? :) Confused here.
– weno
Nov 24 at 19:51




Hello, thanks for sending this! I have one question though. :) In the first sentence, did you mean that g(x) = 0 or g(x) =/= 0? :) Confused here.
– weno
Nov 24 at 19:51












I have one more question: what is the $ u $ in the first example?
– weno
Nov 24 at 19:54




I have one more question: what is the $ u $ in the first example?
– weno
Nov 24 at 19:54












I did mean $g(x)=0$, basically, this is why you're not supposed to divide by 0, and why some people claim that $1/0=infty$. As for $u$, it can be whatever you want it to be - a constant, another function of $x$ - as long as it isn't equal to whatever's in the denominator (because then $f(x)$ would be 1).
– R. Burton
Nov 24 at 21:03






I did mean $g(x)=0$, basically, this is why you're not supposed to divide by 0, and why some people claim that $1/0=infty$. As for $u$, it can be whatever you want it to be - a constant, another function of $x$ - as long as it isn't equal to whatever's in the denominator (because then $f(x)$ would be 1).
– R. Burton
Nov 24 at 21:03














This answer is terribly muddled! "There are two ways this can happen"? Where did that come from?
– TonyK
Nov 26 at 0:23




This answer is terribly muddled! "There are two ways this can happen"? Where did that come from?
– TonyK
Nov 26 at 0:23












Generally, any problem involving an infinite amount of something can be solved using an infinite series. There are two ways because it is intuitively obvious that $tan{x}$ has infinitely many vertical asymptotes, but arbitrarily complicated functions can be built using infinite sums.
– R. Burton
Nov 26 at 4:13




Generally, any problem involving an infinite amount of something can be solved using an infinite series. There are two ways because it is intuitively obvious that $tan{x}$ has infinitely many vertical asymptotes, but arbitrarily complicated functions can be built using infinite sums.
– R. Burton
Nov 26 at 4:13


















draft saved

draft discarded




















































Thanks for contributing an answer to Mathematics Stack Exchange!


  • Please be sure to answer the question. Provide details and share your research!

But avoid



  • Asking for help, clarification, or responding to other answers.

  • Making statements based on opinion; back them up with references or personal experience.


Use MathJax to format equations. MathJax reference.


To learn more, see our tips on writing great answers.





Some of your past answers have not been well-received, and you're in danger of being blocked from answering.


Please pay close attention to the following guidance:


  • Please be sure to answer the question. Provide details and share your research!

But avoid



  • Asking for help, clarification, or responding to other answers.

  • Making statements based on opinion; back them up with references or personal experience.


To learn more, see our tips on writing great answers.




draft saved


draft discarded














StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fmath.stackexchange.com%2fquestions%2f3011611%2finfinite-amount-of-vertical-asymptotes%23new-answer', 'question_page');
}
);

Post as a guest















Required, but never shown





















































Required, but never shown














Required, but never shown












Required, but never shown







Required, but never shown

































Required, but never shown














Required, but never shown












Required, but never shown







Required, but never shown







Popular posts from this blog

Plaza Victoria

Puebla de Zaragoza

Musa