如图中表示15的算术平方根的点是______.-数学


                  无理数{                      }无限不循环小数
                                    负无理数


(2)按性质分类:
                                                     正整数
                                正有理数{
             正实数{                        正分数
                                正无理数                          

实数{   零                                 负整数
                               负有理数{
             负实数{                       负分数                 
                               负无理数