若c为正整数,且
,则下列结论:
①
;②抛物线
的对称轴为直线
;
③
的最小值为24.其中正确的个数有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a14f59da5071c1dfa7aa9a1016396d11.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fc4a31de600a0f5890397706141cb76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/840e7e5953ed9e19602574f91d9c40e8.png)
A.0个 | B.1个 | C.2个 | D.3个 |
2023·重庆九龙坡·模拟预测 查看更多[2]
更新时间:2023-04-07 22:23:46
|
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【推荐1】下列等式变形中,错误的是()
A.由a=b,得a+5=b+5 | B.由–3x=–3y,得x=y |
C.由x+m=y+m,得x=y | D.由a=b,得![]() |
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【推荐2】运用等式性质进行的变形,一定正确的是( )
A.如果![]() ![]() | B.如果![]() ![]() |
C.如果![]() ![]() | D.如果![]() ![]() |
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【推荐1】定义
为
,
,
中的最小值,例如:
,
.如果
,那么
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7f9083f495fa6685e26b4c5d86e2c5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e207dc211fe4bc8e5c3f9c9854703295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d8e0b4b01607aac1803cb554bb8eb18.png)
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A.![]() | B.![]() ![]() | C.![]() | D.![]() ![]() |
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【推荐2】已知二次函数
的图象如图所示,则下列结论
①
;②
;③
;④当
时,
;⑤
中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/9c1729c3-4315-4c00-8a1e-892e7b0fe7a2.png?resizew=140)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc90b02a4cd1425aabfc192b1cdee17.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77694c11ba40ec5c2fc4f6a05e31a048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4630bb948780be53bc73d9ddef875000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcd2336e50c0afb3e8e73a6ea9070ded.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24b843858ba23012c724dea0c51d54a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94cbc6fbdb7a42c4f3f63ce6424e2eab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/9c1729c3-4315-4c00-8a1e-892e7b0fe7a2.png?resizew=140)
A.①②③ | B.①②④⑤ | C.①③④ | D.①②④ |
您最近一年使用:0次