解题方法
1 . 在四边形
中,
,D为
外一点,
则四边形
面积最大时![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db90c0feb35aa54464f1303be9118f37.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd140f339486b98c81f889412cd8c199.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1b0a929ad270b3946459a08c3549ea9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db90c0feb35aa54464f1303be9118f37.png)
您最近一年使用:0次
名校
解题方法
2 . 函数
,
,则
的值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d44c9a11df7ecda38f75054aea50e096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf817718e3b0428cf9193a247fca9030.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eca80d80b6e1577762585b69145736b.png)
您最近一年使用:0次