已知P|1-x-1⼀3|小于等于2;q:x2-2x+1-m2小于等于0(m大于0),若-p是-q的必要非充分条件,求实数m的取值范围

2025-05-14 12:25:41
推荐回答(2个)
回答1:

p:|1-(x-1)/3|=|(4-x)/3|<=2
∴|x-4|<=6-6<=x-4<=6,即-2<=x<=10
q:x²-2x 1<=m²
∴(x-1)²<=m²-m<=x-1<=m,即1-m<=x<=1 m
p是q的充分不必要条件
,即-2<=x<=10在1-m<=x<=1 m上
1-m<=-2,1 m>=10
∴m>=9综上
,m范围为[9, ∞)

回答2:

/1-x-1/3|小于等于2?