集合A={(x,y)丨x^2+mx-y+2=0} 集合B={(x,y)丨x-y+1=0 且0≤x≤2} 又 A∩B≠空集,求实数m的取值范围
来源:学生作业帮助网 编辑:六六作业网 时间:2024/08/30 05:14:19
集合A={(x,y)丨x^2+mx-y+2=0}集合B={(x,y)丨x-y+1=0且0≤x≤2}又A∩B≠空集,求实数m的取值范围集合A={(x,y)丨x^2+mx-y+2=0}集合B={(x,y)
集合A={(x,y)丨x^2+mx-y+2=0} 集合B={(x,y)丨x-y+1=0 且0≤x≤2} 又 A∩B≠空集,求实数m的取值范围
集合A={(x,y)丨x^2+mx-y+2=0} 集合B={(x,y)丨x-y+1=0 且0≤x≤2} 又 A∩B≠空集,求实数m的取值范围
集合A={(x,y)丨x^2+mx-y+2=0} 集合B={(x,y)丨x-y+1=0 且0≤x≤2} 又 A∩B≠空集,求实数m的取值范围
A={(x,y)丨x^2+mx-y+2=0}
= { (x,y) | y=x^2+mx+2}
B={(x,y)丨x-y+1=0 且0≤x≤2}
= {(x,y)丨y=x+1 且0≤x≤2}
A∩B≠空集, then
x^2+mx+2 = x+1
x^2+(m-1)x+1=0
for real roots
△≥0
(m-1)^2 - 4 ≥0
m^2 -2m -3 ≥0
(m-3)(m+1)≥0
-1≤m≤3
A的集合=(-m+根号下m^2-8)/2 和(-m-根号下m^2-8)/2 B的集合就求出最值(0,1)和(2,3)再求出M的集合就可以了。
集合A={(x,y)|y=-x^2+mx-1},B={(x,y)|y=3-x,0
高二数学题难死了集合A={(x,y)丨y=-x^2+mx-1},B={(x,y)丨y=3-x,0
全题是:集合A={(x,y)丨y=-x^2+mx-1},B={(x,y)丨y=3-x,0
已知集合A={(x,y)|y=x的平方+mx+2}.B={(x,y)|x
集合A={(x,y)|x^2+mx-y+2=0},集合B={(x,y)|x-y+1=0,且0
集合A={(x,y)|x^2+mx-y+2=0},集合{(x,y)|x-y+1=0,且0
已知集合A={(x,y)|x2+mx-y+2=0}...
设集合A={(x,y)|y=x^2+mx+2},B={(x,y)|x-y+1=0,x
已知集合A={(x,y)|x*x+mx-y+2=0},B={(x,y)|x-y+1=o,0
已知集合A={(x,y)|x*x+mx-y+2=0},B={(x,y)|x-y+1=o,0
设集合A={x|x^2+mx+1=0,x∈R},B=y|y
设集合A={x|x^2+mx+1=0,x∈R},B=y|y
已知集合A={(x,y)|y=-x2+mx-1},B={(x,y)|x+y=3,0
已知集合A={(x,y)|x^2+mx+2=y},B={(x,y)|x-y+1=0,0
集合A={(x,y)|x^2+mx-y+2=0} B={(x,y)|x-y+1=0,0
集合A={(x,y)|x^2+mx-y+2=0} B={(x,y)|x-y+1=0,0
已知集合A=(x,y))∣x^2+mx-y+2=0,B=(x,y))∣x-y+1=0,0
已知集合A={(x,y)|x^2+mx-y+2=0},B={(x,y)|x-y+1=0,0