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如图,已知抛物线y1=-x2+4x和直线y2=2x.我们约定:当x任取值时,x对应的函数值分别为y1,y2,若y1≠y2,取y1,y2中的较小值记为M,若y1=y2,记M=y1=y2,下列判断:①当...
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已知O.为坐标原点抛物线y1=ax2+bx+ca≠0与x轴相交于点A.x10Bx20与y轴交于点C.
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已知抛物线y2=2pxp>0过其焦点且斜率为1的直线交抛物线于
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已知抛物线y2=4x的焦点为F.过F.的直线与该抛物线相交于
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+
的最小值是( ) A.4 B.8
12
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