挑战习题
1/5单选题
难度:

1.已知点A(-1,0)在抛物线y=ax2+2上,则此抛物线的解析式为(  )
A y=x2+2
B y=x2-2
C y=-x2+2
D y=-2x2+2
提示1:
IOWwhueCuUHvvIgtMe+8jDDvvInku6PlhaXop6PmnpDlvI95PWF4PHN1cD4yPC9zdXA+KzLvvIzljbPlj6/msYLlh7ph55qE5YC877yM5LuO6ICM5rGC5Ye65oqb54mp57q/55qE6Kej5p6Q5byPLg==
正确答案:RA==
6Kej77ya5bCG54K5Qe+8iC0x77yMMO+8ieS7o+WFpeino+aekOW8j3k9YXg8c3VwPjI8L3N1cD4rMuW+l++8jDxicj5hKzI9MO+8jDxicj7op6PlvpfvvIxhPS0y77yMPGJyPuaVheWHveaVsOino+aekOW8j+S4unk9LTJ4PHN1cD4yPC9zdXA+KzIuIDxicj7mlYXpgIlELiA=