答:
y=x²-(2m-1)x+m²-m
y=x-3m+4
两式联立有:
y=x²-(2m-1)x+m²-m=x-3m+4
整理得:x²-2mx+m²+2m-4=0
判别式△=(-2m)²-4(m²+2m-4)
△=16-8m
1)存在2个交点,△=16-8m>0,m
答:
y=x²-(2m-1)x+m²-m
y=x-3m+4
两式联立有:
y=x²-(2m-1)x+m²-m=x-3m+4
整理得:x²-2mx+m²+2m-4=0
判别式△=(-2m)²-4(m²+2m-4)
△=16-8m
1)存在2个交点,△=16-8m>0,m