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> (本题4分)先化简,再求值:,其中.-九年级数学
(本题4分)先化简,再求值:,其中.-九年级数学
题目简介
(本题4分)先化简,再求值:,其中.-九年级数学
题目详情
(本题4分)先化简,再求值:
,其中
.
题型:解答题
难度:中档
来源:不详
答案
化简为
3分 值为
1分
解:
将
代入得
上一篇 :
—I’m sorry, I shouldn’t h
下一篇 :
What a pity! When we got to
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题目简介
(本题4分)先化简,再求值:,其中.-九年级数学
题目详情
答案
解:
将