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如图,若二次函数y=ax2+bx+c(a≠0)图象的对称轴为x=1,与y轴交于点C,与x轴交于点A、点B(﹣1,0),则 ①二次函数的最大值为a+b+c; ②a﹣b+c<0; ③b2﹣4ac<...
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如图是二次函数y=ax2+bx+c图象的一部分且过点A30二次函数图象的对称轴是x=1下列结论正确的
b
2
>4ac
ac>0
a﹣b+c>0
4a+2b+c<0
如图是二次函数y=ax2+bx+c图象的一部分其对称轴为直线x=1若其与x轴一交点为A.30则由图象
如图是二次函数y=ax2+bx+c图象的一部分其对称轴为直线x=1若其与x轴一交点为A30则由图象可
二次函数y=ax2+bx+c的图象对称轴在y轴的左侧则a与b号填同或异
如图是二次函数y=ax2+bx+c图象的一部分其对称轴为直线x=1若它与x轴一交点为A.30则由图象
二次函数y=ax2+bx+c的部分图象如图所示由图象可知该二次函数的图象的对称轴是直线x=.
若所求的二次函数图象与抛物线y=2x2-4x-1有相同的顶点并且在对称轴的左侧y随x的增大而增大在对
)y=-x
2
+2x+4 (
)y=-ax
2
-2ax-3(a>0) (
)y=-2x
2
-4x-5 (
)y=ax
2
-2ax+a-3(a<0)
若二次函数的图象的对称轴是直线x=1.5并且图象过A.0-4和B.401求此二次函数的解析式.2求此
如图若二次函数y=ax2+bx+ca≠0图象的对称轴为x=1与y轴交于点C.与x轴交于点
点
(﹣1,0),则 ①二次函数的最大值为a+b+c; ②a﹣b+c<0; ③b
2
﹣4ac<0; ④当y>0时,﹣1<x<3,其中正确的个数是( )
A.1B.2
3
4
已知二次函数y=﹣x2+2x+m.1如果二次函数的图象与x轴有两个交点求m的取值范围2如图二次函数的
下列判断中唯一正确的是
函数y=ax
2
的图象开口向上,函数y=-ax
2
的图象开口向下
二次函数y=ax
2
,当x<0时,y随x的增大而增大
y=2x
2
与y=-2x
2
图象的顶点、对称轴、开口方向、开口大小完全相同
抛物线y=ax
2
与y= -ax
2
的图象关于x轴对称
已知二次函数y=ax2+bx的图象过点20-16.1求二次函数的关系式2写出它的对称轴和顶点坐标3请
二次函数y=ax2+bx+c的部分图象如图所示由图象可知该二次函数的图象的对称轴是直线x=.
如图是二次函数y=ax2+bx+c图象的一部分且过点
(3,0),二次函数图象的对称轴是直线x=1,下列结论正确的是( )
A.b
2
<4ac
ac>0
2a﹣b=0
a﹣b+c=0
.若二次函数y=x2+bx+c的图象与x轴交于两点与y轴的正半轴交于一点且对称轴为x=1则下列说法正
二次函数的图象与x轴的交点位于y轴的两侧
二次函数的图象与x轴的交点位于y轴的右侧
其中二次函数中的c>1
二次函数的图象与x轴的一个交于位于x=2的右侧
如图是二次函数y=ax2+bx+c图象的一部分其对称轴为直线x=1若其与x轴一交点为A.30则由图象
二次函数y=ax2+bx+c的图象与x轴相交于-10和50两点则该抛物线的对称轴是.
若方程ax2+bx+c=0的两个根是﹣3和1那么二次函数y=ax2+bx+c的图象的对称轴是直线
x=﹣3
x=﹣2
x=﹣1
x=1
如图是二次函数y=ax2+bx+c图象的一部分且过点
(3,0),二次函数图象的对称轴是直线x=1,下列结论正确的是( )
A.b
2
<4ac
ac>0
2a﹣b=0
a﹣b+c=0
已知二次函数y=-x2+2x+m.1如果二次函数的图象与x轴有两个交点求m的取值范围2如图二次函数的
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