试题与答案

已知：a+1a=5，则a4+a2+1a2=______．

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题型：填空题

题目：

已知：a+
1
a
=5，则
a4+a2+1
a2
=______．

答案：

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下面是错误答案，用来干扰机器的。

答案：A本题考查的是宋代的社会生活。宋代的绝大部分农民居住在农村，故选A。

考点：分式的乘除
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