Is there such a thing in math the inverse of a sequence?How large need $n$ be taken to ensure that $T_n(x)$...

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Is there such a thing in math the inverse of a sequence?


How large need $n$ be taken to ensure that $T_n(x)$ gives a value of $ln(1.3)$ which has an error of less than $0.0002$?A convergent / divergent sequence of positive numbers such that $lim frac{s_{n+1}}{s_n}=1$What is the pattern of this sequence of numbers?Studying mathematical analysisCircuit Analysis problem (find the problem)Find the inverse of a arcsin functionWhy is the inverse of the derivative of f not the actual derivative of the inverse of f?Is there any application/benefits to write the logarithms forms of inverse trigonometric functions?Does there exist a continuous function $f$ such that $d_{x}(x_{n},x) leq f (d_{y}(y_{n},y))$?Generating a sequence with resticted growth(trying to undering the math notaion and procedure )













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$begingroup$


Such as can I construct a sequence by reversing the order of the approximating sequence of $frac{1}{3}$? So such inverse would look like $left{….,0.333333333,0.3333333,0.333333,...0.3right}$.



(Is it a thing here that math students get points down when ask stupid question? )










share|cite|improve this question











$endgroup$












  • $begingroup$
    You can't, imagine if the first element has $n$ three's but in the original sequence the element with $n+1$ three's come after the one with $n$ three's hence in the new sequence it should be before the first element, a contradiction.
    $endgroup$
    – kingW3
    3 hours ago










  • $begingroup$
    And no, there is a difference between stupid and bad questions, in your case the votes have matchedvso your question divides opinion. Giving enough context helps when you are asking a "stupid" question, i.e. mentioning that you heard it in class or in conversation with a friend or online on some webpage helps. Also mention what was the broad topic if the conversation, so that others will be able to address concerns relating to that in the answer as well.
    $endgroup$
    – астон вілла олоф мэллбэрг
    2 hours ago


















1












$begingroup$


Such as can I construct a sequence by reversing the order of the approximating sequence of $frac{1}{3}$? So such inverse would look like $left{….,0.333333333,0.3333333,0.333333,...0.3right}$.



(Is it a thing here that math students get points down when ask stupid question? )










share|cite|improve this question











$endgroup$












  • $begingroup$
    You can't, imagine if the first element has $n$ three's but in the original sequence the element with $n+1$ three's come after the one with $n$ three's hence in the new sequence it should be before the first element, a contradiction.
    $endgroup$
    – kingW3
    3 hours ago










  • $begingroup$
    And no, there is a difference between stupid and bad questions, in your case the votes have matchedvso your question divides opinion. Giving enough context helps when you are asking a "stupid" question, i.e. mentioning that you heard it in class or in conversation with a friend or online on some webpage helps. Also mention what was the broad topic if the conversation, so that others will be able to address concerns relating to that in the answer as well.
    $endgroup$
    – астон вілла олоф мэллбэрг
    2 hours ago
















1












1








1





$begingroup$


Such as can I construct a sequence by reversing the order of the approximating sequence of $frac{1}{3}$? So such inverse would look like $left{….,0.333333333,0.3333333,0.333333,...0.3right}$.



(Is it a thing here that math students get points down when ask stupid question? )










share|cite|improve this question











$endgroup$




Such as can I construct a sequence by reversing the order of the approximating sequence of $frac{1}{3}$? So such inverse would look like $left{….,0.333333333,0.3333333,0.333333,...0.3right}$.



(Is it a thing here that math students get points down when ask stupid question? )







real-analysis sequences-and-series inverse






share|cite|improve this question















share|cite|improve this question













share|cite|improve this question




share|cite|improve this question








edited 2 hours ago







user917099

















asked 4 hours ago









user917099user917099

1495




1495












  • $begingroup$
    You can't, imagine if the first element has $n$ three's but in the original sequence the element with $n+1$ three's come after the one with $n$ three's hence in the new sequence it should be before the first element, a contradiction.
    $endgroup$
    – kingW3
    3 hours ago










  • $begingroup$
    And no, there is a difference between stupid and bad questions, in your case the votes have matchedvso your question divides opinion. Giving enough context helps when you are asking a "stupid" question, i.e. mentioning that you heard it in class or in conversation with a friend or online on some webpage helps. Also mention what was the broad topic if the conversation, so that others will be able to address concerns relating to that in the answer as well.
    $endgroup$
    – астон вілла олоф мэллбэрг
    2 hours ago




















  • $begingroup$
    You can't, imagine if the first element has $n$ three's but in the original sequence the element with $n+1$ three's come after the one with $n$ three's hence in the new sequence it should be before the first element, a contradiction.
    $endgroup$
    – kingW3
    3 hours ago










  • $begingroup$
    And no, there is a difference between stupid and bad questions, in your case the votes have matchedvso your question divides opinion. Giving enough context helps when you are asking a "stupid" question, i.e. mentioning that you heard it in class or in conversation with a friend or online on some webpage helps. Also mention what was the broad topic if the conversation, so that others will be able to address concerns relating to that in the answer as well.
    $endgroup$
    – астон вілла олоф мэллбэрг
    2 hours ago


















$begingroup$
You can't, imagine if the first element has $n$ three's but in the original sequence the element with $n+1$ three's come after the one with $n$ three's hence in the new sequence it should be before the first element, a contradiction.
$endgroup$
– kingW3
3 hours ago




$begingroup$
You can't, imagine if the first element has $n$ three's but in the original sequence the element with $n+1$ three's come after the one with $n$ three's hence in the new sequence it should be before the first element, a contradiction.
$endgroup$
– kingW3
3 hours ago












$begingroup$
And no, there is a difference between stupid and bad questions, in your case the votes have matchedvso your question divides opinion. Giving enough context helps when you are asking a "stupid" question, i.e. mentioning that you heard it in class or in conversation with a friend or online on some webpage helps. Also mention what was the broad topic if the conversation, so that others will be able to address concerns relating to that in the answer as well.
$endgroup$
– астон вілла олоф мэллбэрг
2 hours ago






$begingroup$
And no, there is a difference between stupid and bad questions, in your case the votes have matchedvso your question divides opinion. Giving enough context helps when you are asking a "stupid" question, i.e. mentioning that you heard it in class or in conversation with a friend or online on some webpage helps. Also mention what was the broad topic if the conversation, so that others will be able to address concerns relating to that in the answer as well.
$endgroup$
– астон вілла олоф мэллбэрг
2 hours ago












1 Answer
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$begingroup$

A sequence is ultimately a map whose domain is $mathbb N$, but the object that you describe (a) has no first term, and (b) terminates.



If you want, I suppose you could define an object whose indices run from $-infty$ to $0$, but that's not appreciably different from looking at the original sequence while standing on your head.






share|cite|improve this answer











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    1 Answer
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    7












    $begingroup$

    A sequence is ultimately a map whose domain is $mathbb N$, but the object that you describe (a) has no first term, and (b) terminates.



    If you want, I suppose you could define an object whose indices run from $-infty$ to $0$, but that's not appreciably different from looking at the original sequence while standing on your head.






    share|cite|improve this answer











    $endgroup$


















      7












      $begingroup$

      A sequence is ultimately a map whose domain is $mathbb N$, but the object that you describe (a) has no first term, and (b) terminates.



      If you want, I suppose you could define an object whose indices run from $-infty$ to $0$, but that's not appreciably different from looking at the original sequence while standing on your head.






      share|cite|improve this answer











      $endgroup$
















        7












        7








        7





        $begingroup$

        A sequence is ultimately a map whose domain is $mathbb N$, but the object that you describe (a) has no first term, and (b) terminates.



        If you want, I suppose you could define an object whose indices run from $-infty$ to $0$, but that's not appreciably different from looking at the original sequence while standing on your head.






        share|cite|improve this answer











        $endgroup$



        A sequence is ultimately a map whose domain is $mathbb N$, but the object that you describe (a) has no first term, and (b) terminates.



        If you want, I suppose you could define an object whose indices run from $-infty$ to $0$, but that's not appreciably different from looking at the original sequence while standing on your head.







        share|cite|improve this answer














        share|cite|improve this answer



        share|cite|improve this answer








        edited 2 hours ago

























        answered 3 hours ago









        J. MurrayJ. Murray

        53017




        53017






























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