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> 对于题目:“化简并求值,其中”小明解答如下:解:原式==,当时,原式=。你认为小明的解法正确吗?若不正确,请写出正确答案。-九年级数学
对于题目:“化简并求值,其中”小明解答如下:解:原式==,当时,原式=。你认为小明的解法正确吗?若不正确,请写出正确答案。-九年级数学
题目简介
对于题目:“化简并求值,其中”小明解答如下:解:原式==,当时,原式=。你认为小明的解法正确吗?若不正确,请写出正确答案。-九年级数学
题目详情
对于题目:“化简并求值,
其中
”小明解答如下:
解:原式=
=
,当
时,原式=
。
你认为小明的解法正确吗?若不正确,请写出正确答案。
题型:解答题
难度:中档
来源:江苏期末题
答案
解:小明的解法不正确,正确:原式=
,
∵
时,
∴
∴原式=
。
上一篇 :
—I felt it very difficult t
下一篇 :
计算的结果是[]A.1B.-1C.D.-九
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题目简介
对于题目:“化简并求值,其中”小明解答如下:解:原式==,当时,原式=。你认为小明的解法正确吗?若不正确,请写出正确答案。-九年级数学
题目详情
解:原式=
=
你认为小明的解法正确吗?若不正确,请写出正确答案。
答案
∵
∴
∴原式=