题目内容

分析集合A={1,2,3}上的下述五个关系。（1）R={<1,1>,<1,2>,<1,3>,<3,3>}（2）S={<1,1>,<1,2>,<2,1>,<2,2>,<3,3>}（3）T={<1,1>,<1,2>,<2,2>,<2,3>}（4）空关系（5）全域关系判断A中的上述关系是不是自反的、对称的、可传递的、反对称的、反自反的。

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设集合A={a，b，c，d}，A上的关系R={,,}（1）用矩阵运算和作图方法求出R的自反闭包、对称闭包和传递闭包；（2）用Warshall算法求出R的传递闭包。

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罗尓中值定理无法判断导函数的零点是否存在.

A. 对
B. 错