已知抛物线
的对称轴为直线
,与x轴的一个交点坐标为
,其部分图象如图所示,下列结论:①抛物线过原点;②
;③
;④抛物线的顶点坐标为
;⑤当
时,y随x增大而增大.其中结论正确的有( )个
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5562c94a46502fb52e8d0c45e98406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80e1cb37d995b99834922b27c322b201.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcd2336e50c0afb3e8e73a6ea9070ded.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e595eafefb61a2806fdd94093fe35e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200849ce71f53c0321506e27de437b8d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/15/bc4dd26b-ba65-41d0-901d-af5a5b5c8b8c.png?resizew=139)
A.2 | B.3 | C.4 | D.5 |
更新时间:2023-10-15 18:33:16
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【推荐1】关于二次函数
,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0913f07bbfb540b5320dd2ce507a5970.png)
A.图象的对称轴在![]() | B.图象与![]() ![]() |
C.图象与![]() ![]() ![]() | D.函数的最小值为![]() |
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【推荐2】如图所示,抛物线
的顶点为
,与x轴的交点A在点
和
之间,以下结论:①
;②
;③
;④
,其中正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/097e8a6a6de675f44d3bef88bb37375c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/079dd115a4b8cbc93918a853363786dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccc8350b12974ffc8d06fce36d158f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae28deb43063b00c3200496fbb2da2d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12e7ef804eeb23618fbf91ead47587f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbbcf3f7721240b8d2161f8c66a0fcf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1136299aa9b0c6fec3f98ddfe56e54ba.png)
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐1】对称轴为直线
的抛物线
(a、b、c为常数,且
)如图所示,小明同学得出了以下结论:①
,②
,③
,④当
时,y随x的增大而增大,⑤
(m为任意实数)其中结论正确的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77694c11ba40ec5c2fc4f6a05e31a048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/375386102cba5bfd93bdf340216eb22d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad29acf28ab96fb1604e80c743bd738f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7da6d82d173ad18cc040e94c925b5ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39a0377574f2d06e2b4ece36583ddac6.png)
A.3 | B.2 | C.5 | D.6 |
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【推荐2】如图是二次函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
图象的一部分,对称轴是直线
.关于下列结论:①
;②
;③
;④
;⑤方程
的两个根为
,
,其中正确的结论有( ).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/2/bf163aed-81dc-4926-b614-d60ce510f604.png?resizew=160)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f5bb89c3ad435f1ef59307b174105ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94ed37ee7432002cd0e0978b2012e184.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4630bb948780be53bc73d9ddef875000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdcab205212d1a85ee3af7adb95ce043.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5bef1d5330e300d62afc9b3ae6ce880.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f45cb617a32bd36ef4a013de0e2e5b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62b6ab454199d2738ea1b5cefb133d50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a52b74ade6b5434aee52b6e56bc694.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/2/bf163aed-81dc-4926-b614-d60ce510f604.png?resizew=160)
A.2个 | B.3个 | C.4个 | D.5个 |
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