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歡迎您訪問數學考題練習:若M、N、P三點都在函數(m為常數)的圖象上,!

數學考題練習:若M、N、P三點都在函數(m為常數)的圖象上,

更新時間:2024-01-12 16:27:16作者:貝語網校

若M、N、P三點都在函數(m為常數)的圖象上,則y1、y2、y3的大小關系為

A.y2>y3>y1

B.y2>y1>y3

C.y3>y1>y2

D.y3>y2>y1

試題答案

B

試題解析

首先根據-m2-1<0,得出反比例函數的增減性,再利用三點所在象限不同得出它們的大小關系.

解答:∵M、N、P三點都在函數的圖象上,

∵-m2-1<0,

∴每個象限內y隨x的增大而增大,

∵-<-,

∴0<y1<y2

∵x=時,y<0,

∴y2>y1>y3

故選:B.

點評:此題主要考查了反比例函數的性質,根據已知得出三點對應y的值大小關系是解題關鍵.

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