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歡迎您訪問數學考題練習:已知反比例函數y=的圖象在第二、四象限,則a的!

數學考題練習:已知反比例函數y=的圖象在第二、四象限,則a的

更新時間:2024-01-12 12:59:43作者:貝語網校

已知反比例函數y=的圖象在第二、四象限,則a的取值范圍是

A.a≤2

B.a≥2

C.a<2

D.a>2

試題答案

C

試題解析

本題考查反比例函數的圖象和性質,此圖象位于二、四象限,則根據k<0求解.

解答:反比例函數y=的圖象在第二、四象限,根據反比例函數的圖象和性質,a-2<0,

則a<2.

故選C.

點評:本題考查了反比例函數的性質:①、當k>0時,圖象分別位于第一、三象限;當k<0時,圖象分別位于第二、四象限.

②、當k>0時,在同一個象限內,y隨x的增大而減小;當k<0時,在同一個象限,y隨x的增大而增大.

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