Page 12 - 人教二数
P. 12

# ! !$$JK@LMNOM# 4$
                                                                                                           !
                                                                                                           !
                                                                                                           !
                                                                                                           !
                                                                                                           (
                                                                                !
                                       !!!        !#"#          !   .,/! "



                                                             # %. `abcdefBgch&
              ! !"#$                                         #                              # ./0& $#!%#$#% $
                                                             #
                                                             #
           !. 2-2' P1Q$8LQ$8@R1L #
                                                             #
              MSTUVWX(                  # ./0& $#!%#$## $    #
                                                             #
                                                             #
              ! % " Gbcd!           "#                       #
                               !!
                                                             #
              ! ) " e!      "                                #
                      !! dfg#
                                                             #
                                                             #
              ! , " J d h 3 c G f i !              "% j k #
                                             ! !
                                                             #
                  !      "                                   #
                    !! dl% #
                                                             #    ! % " rstuvwoLYx$
                                                             #
           #. YZ[                  %                         #
                                                             #
                                                             #
                      "
                                              "
             ,(*%+ (" !!! ,'*)! ((                           #    ! ) " rTyuvwoLYx$
                                                             #
                                                             #
                     "
                                            "
             !*/+ ')                 '*)! ,(                 #
                                                             #
                                                             #
                      "
                                              "
             ))*/+ +"                )'*(! !"                #    ! , " zro{|$ woLYx$
                                                             #
                                                             #
                                                             #
              ! %&'(                                         #
                                                             #
           &. Y\]^_%                    # ./0& $#!%#$#& $    #
                                                             #
                                                             #
                                                             #   ! )*"+
                                                             #
                                                             # ".                           # ./0& $#!%#$#" $
                                                             #
                                                             #
                                                             #
                                                             #
              =mnoLYJpq$                                     #
                                                             #
                                                             #
                                                             #
                                                             #
                                                             #
                                                             #
                                                             #
                                                             #
                                                             #
                                                             #
                                                             #
                                                             #
                                                             #    23 !        "% }3 !         "% ~3 !        "%
                                                                                        !!
                                                                         !!
                                                                                                        !!
                                                             #
                                                             #    3 !        "% c3 !         "% s3 !        "#
                                                                                        !!
                                                                                                        !!
                                                                         !!
                                                             #
                                                             #
                                                             #
                                                             #
                                                             #
                          !! %&*%(3!!!!!!! )'*%%3!!!!!!! ))*)(3
                          !! ,%*+3                       ,(*%)3                    &'*))3
   7   8   9   10   11   12   13   14   15   16   17