What are the accumulation points of ( $pi,2pi$ ] $subsetmathbb{R}$?












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I was just curious as to what the accumulation points of ( $pi,2pi$ ] $subsetmathbb{R}$ are. I had gotten $pi,2pi$,1. But the other answers are 3 and 5.










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  • $begingroup$
    can you include some workings how do you obtain those partial results?
    $endgroup$
    – Siong Thye Goh
    Nov 26 '18 at 3:05
















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$begingroup$


I was just curious as to what the accumulation points of ( $pi,2pi$ ] $subsetmathbb{R}$ are. I had gotten $pi,2pi$,1. But the other answers are 3 and 5.










share|cite|improve this question









$endgroup$












  • $begingroup$
    can you include some workings how do you obtain those partial results?
    $endgroup$
    – Siong Thye Goh
    Nov 26 '18 at 3:05














0












0








0





$begingroup$


I was just curious as to what the accumulation points of ( $pi,2pi$ ] $subsetmathbb{R}$ are. I had gotten $pi,2pi$,1. But the other answers are 3 and 5.










share|cite|improve this question









$endgroup$




I was just curious as to what the accumulation points of ( $pi,2pi$ ] $subsetmathbb{R}$ are. I had gotten $pi,2pi$,1. But the other answers are 3 and 5.







real-analysis






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asked Nov 26 '18 at 2:57









Karl TeschKarl Tesch

1




1












  • $begingroup$
    can you include some workings how do you obtain those partial results?
    $endgroup$
    – Siong Thye Goh
    Nov 26 '18 at 3:05


















  • $begingroup$
    can you include some workings how do you obtain those partial results?
    $endgroup$
    – Siong Thye Goh
    Nov 26 '18 at 3:05
















$begingroup$
can you include some workings how do you obtain those partial results?
$endgroup$
– Siong Thye Goh
Nov 26 '18 at 3:05




$begingroup$
can you include some workings how do you obtain those partial results?
$endgroup$
– Siong Thye Goh
Nov 26 '18 at 3:05










1 Answer
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$begingroup$

Every point in $[pi, 2 pi]$ is an accumulation point of $(pi, 2pi]$ since any neighbourhood of any point of in $[pi, 2 pi]$ contains a point of $(pi, 2pi]$.






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    $begingroup$

    Every point in $[pi, 2 pi]$ is an accumulation point of $(pi, 2pi]$ since any neighbourhood of any point of in $[pi, 2 pi]$ contains a point of $(pi, 2pi]$.






    share|cite|improve this answer









    $endgroup$


















      1












      $begingroup$

      Every point in $[pi, 2 pi]$ is an accumulation point of $(pi, 2pi]$ since any neighbourhood of any point of in $[pi, 2 pi]$ contains a point of $(pi, 2pi]$.






      share|cite|improve this answer









      $endgroup$
















        1












        1








        1





        $begingroup$

        Every point in $[pi, 2 pi]$ is an accumulation point of $(pi, 2pi]$ since any neighbourhood of any point of in $[pi, 2 pi]$ contains a point of $(pi, 2pi]$.






        share|cite|improve this answer









        $endgroup$



        Every point in $[pi, 2 pi]$ is an accumulation point of $(pi, 2pi]$ since any neighbourhood of any point of in $[pi, 2 pi]$ contains a point of $(pi, 2pi]$.







        share|cite|improve this answer












        share|cite|improve this answer



        share|cite|improve this answer










        answered Nov 26 '18 at 3:07









        SheafsSheafs

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