计算:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200b8820dc813f802a6ff513788d23da.png)
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200b8820dc813f802a6ff513788d23da.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eae193ce0b2a9b370eb90363fe1f5044.png)
更新时间:2024-04-12 12:13:59
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解答题-问答题
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较易
(0.85)
【推荐2】从
,
,
,
,
这七个数字中任取三个不同的数字,分别作为函数
的系数
,
,
,求:
可组成多少个不同的二次函数?
其中对称轴是
轴的抛物线有多少条?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07096af3b99fd1cb11c31f19a2c6408e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.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/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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