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歡迎您訪問數學考題練習:能使(3x-1)-(5x+2)>這個不等式成立!

數學考題練習:能使(3x-1)-(5x+2)>這個不等式成立

更新時間:2024-01-12 16:25:04作者:貝語網校

能使(3x-1)-(5x+2)>這個不等式成立的x的最大整數值是________.

試題答案

-1

試題解析

首先利用不等式的基本性質解不等式,再從不等式的解集中找出適合條件的整數即可.

解答:不等式(3x-1)-(5x+2)>的解集為x<-,

所以其最大的負整數為-1.

點評:正確解不等式,求出解集是解決本題的關鍵.解不等式要用到不等式的性質:

(1)不等式的兩邊加(或減)同一個數(或式子),不等號的方向不變;

(2)不等式兩邊乘(或除以)同一個正數,不等號的方向不變;

(3)不等式的兩邊乘(或除以)同一個負數,不等號的方向改變.

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