In topology,Find all points of the set B={(-2,-2),(1,1),(0,-1),(0,3)}, which are contained in the closed ball...












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Find all points of the set B={(-2,-2),(1,1),(0,-1),(0,3)}, which are contained in the closed ball B((0,0),2) in the metric space (R^2,d1),where d1 is defined by the formula



d1((x1,y1),(x2,y2))=|x1-x2|+|y1-y2|.



Does anybody clearly explain and solve by formally ?



Many thanks!










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    $begingroup$


    Find all points of the set B={(-2,-2),(1,1),(0,-1),(0,3)}, which are contained in the closed ball B((0,0),2) in the metric space (R^2,d1),where d1 is defined by the formula



    d1((x1,y1),(x2,y2))=|x1-x2|+|y1-y2|.



    Does anybody clearly explain and solve by formally ?



    Many thanks!










    share|cite|improve this question











    $endgroup$















      -1












      -1








      -1





      $begingroup$


      Find all points of the set B={(-2,-2),(1,1),(0,-1),(0,3)}, which are contained in the closed ball B((0,0),2) in the metric space (R^2,d1),where d1 is defined by the formula



      d1((x1,y1),(x2,y2))=|x1-x2|+|y1-y2|.



      Does anybody clearly explain and solve by formally ?



      Many thanks!










      share|cite|improve this question











      $endgroup$




      Find all points of the set B={(-2,-2),(1,1),(0,-1),(0,3)}, which are contained in the closed ball B((0,0),2) in the metric space (R^2,d1),where d1 is defined by the formula



      d1((x1,y1),(x2,y2))=|x1-x2|+|y1-y2|.



      Does anybody clearly explain and solve by formally ?



      Many thanks!







      general-topology






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      share|cite|improve this question













      share|cite|improve this question




      share|cite|improve this question








      edited Jan 11 at 15:48







      Arda Batuhan Demir

















      asked Jan 9 at 16:23









      Arda Batuhan DemirArda Batuhan Demir

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          2 Answers
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          $begingroup$

          It's pretty straight forward isn't it? You are told that the distance between points (a, b) and (c, d) is |a- c|+ |b- d| so the distance from (0, 0) to (x, y) is |x- 0|+ |y- 0|= |x|- |y|. What is the distance from (0, 0) to (-2, -2)? From (0, 0) to (1, 1)? From (0, 0) to (0, -1)? From (0, 0) to (0, 3)?






          share|cite|improve this answer









          $endgroup$













          • $begingroup$
            Could you draw and more then detailed to solving, please ?
            $endgroup$
            – Arda Batuhan Demir
            Jan 10 at 16:35










          • $begingroup$
            Could you more than explain ? because I couldnt be understand.....Could you solving by formally by step by step ? Many thanks...
            $endgroup$
            – Arda Batuhan Demir
            Jan 11 at 15:50



















          0












          $begingroup$

          By definition you can check that only $(0,-1)$ has distance less than $2$ from the origin.






          share|cite|improve this answer











          $endgroup$













          • $begingroup$
            Could you draw and more then detailed to solving, please ?
            $endgroup$
            – Arda Batuhan Demir
            Jan 9 at 18:41










          • $begingroup$
            Could you more than detail and solving by formally ? Many thanks...
            $endgroup$
            – Arda Batuhan Demir
            Jan 11 at 15:49











          Your Answer





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          2 Answers
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          2 Answers
          2






          active

          oldest

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          active

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          active

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          1












          $begingroup$

          It's pretty straight forward isn't it? You are told that the distance between points (a, b) and (c, d) is |a- c|+ |b- d| so the distance from (0, 0) to (x, y) is |x- 0|+ |y- 0|= |x|- |y|. What is the distance from (0, 0) to (-2, -2)? From (0, 0) to (1, 1)? From (0, 0) to (0, -1)? From (0, 0) to (0, 3)?






          share|cite|improve this answer









          $endgroup$













          • $begingroup$
            Could you draw and more then detailed to solving, please ?
            $endgroup$
            – Arda Batuhan Demir
            Jan 10 at 16:35










          • $begingroup$
            Could you more than explain ? because I couldnt be understand.....Could you solving by formally by step by step ? Many thanks...
            $endgroup$
            – Arda Batuhan Demir
            Jan 11 at 15:50
















          1












          $begingroup$

          It's pretty straight forward isn't it? You are told that the distance between points (a, b) and (c, d) is |a- c|+ |b- d| so the distance from (0, 0) to (x, y) is |x- 0|+ |y- 0|= |x|- |y|. What is the distance from (0, 0) to (-2, -2)? From (0, 0) to (1, 1)? From (0, 0) to (0, -1)? From (0, 0) to (0, 3)?






          share|cite|improve this answer









          $endgroup$













          • $begingroup$
            Could you draw and more then detailed to solving, please ?
            $endgroup$
            – Arda Batuhan Demir
            Jan 10 at 16:35










          • $begingroup$
            Could you more than explain ? because I couldnt be understand.....Could you solving by formally by step by step ? Many thanks...
            $endgroup$
            – Arda Batuhan Demir
            Jan 11 at 15:50














          1












          1








          1





          $begingroup$

          It's pretty straight forward isn't it? You are told that the distance between points (a, b) and (c, d) is |a- c|+ |b- d| so the distance from (0, 0) to (x, y) is |x- 0|+ |y- 0|= |x|- |y|. What is the distance from (0, 0) to (-2, -2)? From (0, 0) to (1, 1)? From (0, 0) to (0, -1)? From (0, 0) to (0, 3)?






          share|cite|improve this answer









          $endgroup$



          It's pretty straight forward isn't it? You are told that the distance between points (a, b) and (c, d) is |a- c|+ |b- d| so the distance from (0, 0) to (x, y) is |x- 0|+ |y- 0|= |x|- |y|. What is the distance from (0, 0) to (-2, -2)? From (0, 0) to (1, 1)? From (0, 0) to (0, -1)? From (0, 0) to (0, 3)?







          share|cite|improve this answer












          share|cite|improve this answer



          share|cite|improve this answer










          answered Jan 9 at 16:58









          user247327user247327

          11k1515




          11k1515












          • $begingroup$
            Could you draw and more then detailed to solving, please ?
            $endgroup$
            – Arda Batuhan Demir
            Jan 10 at 16:35










          • $begingroup$
            Could you more than explain ? because I couldnt be understand.....Could you solving by formally by step by step ? Many thanks...
            $endgroup$
            – Arda Batuhan Demir
            Jan 11 at 15:50


















          • $begingroup$
            Could you draw and more then detailed to solving, please ?
            $endgroup$
            – Arda Batuhan Demir
            Jan 10 at 16:35










          • $begingroup$
            Could you more than explain ? because I couldnt be understand.....Could you solving by formally by step by step ? Many thanks...
            $endgroup$
            – Arda Batuhan Demir
            Jan 11 at 15:50
















          $begingroup$
          Could you draw and more then detailed to solving, please ?
          $endgroup$
          – Arda Batuhan Demir
          Jan 10 at 16:35




          $begingroup$
          Could you draw and more then detailed to solving, please ?
          $endgroup$
          – Arda Batuhan Demir
          Jan 10 at 16:35












          $begingroup$
          Could you more than explain ? because I couldnt be understand.....Could you solving by formally by step by step ? Many thanks...
          $endgroup$
          – Arda Batuhan Demir
          Jan 11 at 15:50




          $begingroup$
          Could you more than explain ? because I couldnt be understand.....Could you solving by formally by step by step ? Many thanks...
          $endgroup$
          – Arda Batuhan Demir
          Jan 11 at 15:50











          0












          $begingroup$

          By definition you can check that only $(0,-1)$ has distance less than $2$ from the origin.






          share|cite|improve this answer











          $endgroup$













          • $begingroup$
            Could you draw and more then detailed to solving, please ?
            $endgroup$
            – Arda Batuhan Demir
            Jan 9 at 18:41










          • $begingroup$
            Could you more than detail and solving by formally ? Many thanks...
            $endgroup$
            – Arda Batuhan Demir
            Jan 11 at 15:49
















          0












          $begingroup$

          By definition you can check that only $(0,-1)$ has distance less than $2$ from the origin.






          share|cite|improve this answer











          $endgroup$













          • $begingroup$
            Could you draw and more then detailed to solving, please ?
            $endgroup$
            – Arda Batuhan Demir
            Jan 9 at 18:41










          • $begingroup$
            Could you more than detail and solving by formally ? Many thanks...
            $endgroup$
            – Arda Batuhan Demir
            Jan 11 at 15:49














          0












          0








          0





          $begingroup$

          By definition you can check that only $(0,-1)$ has distance less than $2$ from the origin.






          share|cite|improve this answer











          $endgroup$



          By definition you can check that only $(0,-1)$ has distance less than $2$ from the origin.







          share|cite|improve this answer














          share|cite|improve this answer



          share|cite|improve this answer








          edited Jan 9 at 17:20









          amWhy

          1




          1










          answered Jan 9 at 16:28









          CHOUDHARY bhim senCHOUDHARY bhim sen

          1239




          1239












          • $begingroup$
            Could you draw and more then detailed to solving, please ?
            $endgroup$
            – Arda Batuhan Demir
            Jan 9 at 18:41










          • $begingroup$
            Could you more than detail and solving by formally ? Many thanks...
            $endgroup$
            – Arda Batuhan Demir
            Jan 11 at 15:49


















          • $begingroup$
            Could you draw and more then detailed to solving, please ?
            $endgroup$
            – Arda Batuhan Demir
            Jan 9 at 18:41










          • $begingroup$
            Could you more than detail and solving by formally ? Many thanks...
            $endgroup$
            – Arda Batuhan Demir
            Jan 11 at 15:49
















          $begingroup$
          Could you draw and more then detailed to solving, please ?
          $endgroup$
          – Arda Batuhan Demir
          Jan 9 at 18:41




          $begingroup$
          Could you draw and more then detailed to solving, please ?
          $endgroup$
          – Arda Batuhan Demir
          Jan 9 at 18:41












          $begingroup$
          Could you more than detail and solving by formally ? Many thanks...
          $endgroup$
          – Arda Batuhan Demir
          Jan 11 at 15:49




          $begingroup$
          Could you more than detail and solving by formally ? Many thanks...
          $endgroup$
          – Arda Batuhan Demir
          Jan 11 at 15:49


















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