Re: [問題] 97 東華離散

[fish0835 (以無用為大用)]

※ 引述《s987692 (阿誠)》之銘言：
:                                                  _    _     __   _     __
: Simplify the sum-of-products expansion : xyz + xyz + xyz + xyz + xyz + xyz +
:  ___
:  xyz .
: 對這方面題目不很行，麻煩了~


        _    _     __   _     __     ___
xyz + xyz + xyz + xyz + xyz + xyz +  xyz

          _   _    __    _     _     ___
= x(yz + yz + yz + yz) + x(y + y)z + xyz

      _    ___
= x + xz + xyz

          ___
= x + z + xyz

           __ _
= x + z + (xy)z

          __
= x + z + xy

          _
= x + z + y

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