1. 用代数运算法证明x+yz=(x+y)(x+z) 2. 用代数运算法证明 (x+y)(x+!y)=x 3. 用代数运算法证明xy+yz+(!x) z=x
1. 用代数运算法证明x+yz=(x+y)(x+z) 2. 用代数运算法证明 (x+y)(x+!y)=x 3. 用代数运算法证明xy+yz+(!x) z=x
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