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若在实数范围内有意义,则x的取值范围是()A.x≥-2B.x≠-2C.x≥2D.x≠2-八年级数学
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使式子有意义的x的取值范围是()A.x>1B.x≥C.x<1D.x≥1-九年级数学
题目简介
1、2、3、-八年级数学
题目详情
2、
3、
答案
思路:分别将每项计算出来,再化简
解:(1)原式
(2)原式
(3)原式
点评:此题属于低档试题,计算要小心。