问题补充:
已知抛物线y=(m*2-2)x*2-4mx+n的对称轴是x=2,且它的最高点在直线y=1/2x+1上,则它的顶点为?n的值?快
答案:
(1/2) *4m/(m^2-2)=2
m/(m^2-2)=1
m^2-m-2=0
m=2(舍去),或m=-1
y=-x^2+4x+n=-(x-2)^2+n+4
x=2,y=2
n+4=2n=-2
时间:2023-03-01 12:26:28
已知抛物线y=(m*2-2)x*2-4mx+n的对称轴是x=2,且它的最高点在直线y=1/2x+1上,则它的顶点为?n的值?快
(1/2) *4m/(m^2-2)=2
m/(m^2-2)=1
m^2-m-2=0
m=2(舍去),或m=-1
y=-x^2+4x+n=-(x-2)^2+n+4
x=2,y=2
n+4=2n=-2
已知抛物线y=2x2+mx-3的对称轴是直线x=1 则m=________.
2019-11-06