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歡迎您訪問數(shù)學考題練習:能使成立的x的取值范圍為!

數(shù)學考題練習:能使成立的x的取值范圍為

更新時間:2024-01-12 16:24:54作者:貝語網(wǎng)校

能使成立的x的取值范圍為

A.x>8

B.x≥0

C.0≤x<8

D.x>8或x<8

試題答案

A

試題解析

根據(jù)二次根式的性質(zhì)(被開方數(shù)大于等于0)列出關(guān)于x的不等式組,然后解不等式組即可.

解答:根據(jù)二次根式有意義,分式有意義得:

解得:x>8.

故選A.

點評:本題考查了二次根式的乘除法和二次根式有意義的條件.二次根式的被開方數(shù)是非負數(shù).

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