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> 写出一个无理数,使它与的积为有理数________.-九年级数学
写出一个无理数,使它与的积为有理数________.-九年级数学
题目简介
写出一个无理数,使它与的积为有理数________.-九年级数学
题目详情
写出一个无理数,使它与
的积为有理数__
__ __
__.
题型:填空题
难度:中档
来源:不详
答案
答案不唯一,写出一个即可
利用平方差公式可得,所求无理数为
-2,答案不唯一.
解:与
+2的积是有理数的无理数可以是:
-2.
故答案为
-2(答案不唯一).
本题是一道开放题只要符合题意即可,考查了实数的运算,注意平方差公式.
上一篇 :
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题目简介
写出一个无理数,使它与的积为有理数________.-九年级数学
题目详情
答案
解:与
故答案为
本题是一道开放题只要符合题意即可,考查了实数的运算,注意平方差公式.