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已知抛物线y=ax2+bx+c(a<0)过A(-2,0)、B(0,0)、C(-3...
已知抛物线y=ax2+bx+c(a<0)过A(-2,0)、B(0,0)、C(-3,y1)、D(3,y2)四点,则y1与y2的大小关系是( )
A.y1>y2
B.y1=y2
C.y1<y2
D.不能确定
考点分析:
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