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					                                                .1




                                                             02           01

                                                                                      .1



 .N                                         .                 ........3 2 1 0


                                                                                      :
      (N        2)      2 ∈N                                               2          •
                -2 ∉N                                                 ( -2 )          •
                                                              .(N               (- 2) )
                                                                                  :
                                   .0                    N                            •
                                                .                     N               •

                                                     .                                     .2




           .(              )                             ..... 3 2 1 0 -1 -2 -3......
                                        z



                                                                                      :
                                                                       2∈ z           •
                                                                          0.5 ∉ z •


                                                                                  :
N⊂ z       z                   N
                                                                          . z              N
                               1                                                      :
                                                   .1
                                                                   :                                .3


                           p
   n                  p             :
                          10n
                                        D:
                                                                                                :
                 5                       3                                 2                         1
.(100 =1 ) 5=               5 0.03=         :                    0.03         :
                100                     100                                10                        5
                            p                                                                       11
                          . n
                           10                                                                        7
                                                                                        :
                .                                                                                   .1
                                                            ….                ……

                                            z⊂ D        .                                           .2


                                            .
         2n×5m
                                                        .                                   .




                                                                                   3
                                            160 = 22 ×53
                                                                                  160
                                                                                                     1
                                                            3
                                                                                                     3

                                                                       :                            .4

                                        p
                q               p
                                        q
                                                                                            .
                                                .Q

                                        2                                                       :
                             .1
                                                  7              1
                                                                   :
                                                  10             3


        :                              a
    .            n                                                          -
                     (            n ) 10n              a                    -
                                  .                    (10na-a)             -
            .a               10na-a                                         -


                                                                        :
                                      12.56565656
                     100a-a=1256.565656-12.5656565656=1244
                                           100a-a= 99a
                                              :             2       1
                                                           99a=1244
                                                                1244
                                                           a=
                                                                 99




                                                            :2
                 p
q       p
                 q
                                                   .


                                                                :
                            D ⊂Q
                                       .




                     3                                              :
                               .1
                                         :                             .5

                                .
     I.    1     O                   0                (O ;I)


                O    I
                          R.


                                                               :
R*                       R-                                            R+
                                                  .

                                             .

          N ⊂ Z ⊂ D⊂ Q ⊂ R


                                18           08
                               18            12
                               18            19




                 4                                                 :

				
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