2. 计算机
  3. What is the contra positive of the relation represented in the exhibit shown below?

What is the contra positive of the relation represented in the exhibit shown below?

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问题 What is the contra positive of the relation represented in the exhibit shown below?
选项 A、R= {<1,2>,< 1,3>,<1,4>,<1,5>}
B、R= {< 1,1>,<2,2>,<3,3>,<4,4>,<5,5>}
C、R= {<2,1 >,<4,1>,<2,2>,<1,3>,<3,2>,<1,4>,<4,4>,<5,4>}
D、R= {<1,2>,<3,1>,<1,4>,<2,2>,<2,3>,<4,1>,<4,4>,<4,5>}
答案C
解析
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原NCRE全国计算机四级

NCRE全国计算机四级

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