下列集合对所给的二元运算封闭的是（　　　） -题库考试答案搜索网

下列集合对所给的二元运算封闭的是（　　　）

单选题

2021-09-01 20:46

A、正整数集上的减法运算
B、在正实数的集R+上规定为ab=ab-a-b a,b∈R+
C、正整数集Z+上的二元运算为xy=min(x,y) x,y∈Z+
D、全体n×n实可逆矩阵集合Rn×n上的矩阵加法

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正确答案

C

试题解析

标签：联大河南理工大学计算机科学与技术离散数学

感兴趣题目

写出以下运算符代表信义：AND（），OR（）。

翻译：With Average or With Particular Average（WA or WPA）（）

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逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

●设AND、OR和NOT分别表示按位与、按位或和按位求反运算，且X=10011011，Y=01111010，Z=11101000，则(NOT(X) AND Y)= (9) ， (Y OR NOT(Z))= (10) 。10011011011110101110100001100000(10)

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

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