问题
问答题
Which of the following inequalities is an algebraic expression for the shaded part of the number line above ?
答案
参考答案:
|x+1|≤4
解析:
上面数轴中的阴影部分可用不等式表达为:
-5≤x≤3
→-5+1≤x+1≤3+1
→-4≤x+1≤4
→|x+1|≤4
Which of the following inequalities is an algebraic expression for the shaded part of the number line above ?
参考答案:
|x+1|≤4
解析:
上面数轴中的阴影部分可用不等式表达为:
-5≤x≤3
→-5+1≤x+1≤3+1
→-4≤x+1≤4
→|x+1|≤4