作者fish0835 (以无用为大用)
看板Grad-ProbAsk
标题Re: [问题] 97 东华离散
时间Tue Apr 7 11:06:31 2009
※ 引述《s987692 (阿诚)》之铭言：
: _ _ __ _ __
: Simplify the sum-of-products expansion : xyz + xyz + xyz + xyz + xyz + xyz +
: ___
: xyz .
: 对这方面题目不很行，麻烦了~
_ _ __ _ __ ___
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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1F：推 s987692:感谢 04/07 14:20