名校
1 . 在三棱锥中,
平面ABC,
,且三棱锥
的体积为
,若三棱锥
的四个顶点都在同一个球的球面上,则该球的表面积为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf6894048c78b318ef93780873244e72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a391005600bdd69c96750589f9adb048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
您最近一年使用:0次
2020-02-15更新
|
501次组卷
|
2卷引用:2019届重庆市江津中学、合川中学等七校高三第三次诊断性考试(文科)数学试题
名校
2 . 等差数列
中,若
,其前n项和为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9884f3d239fd9e6c188e0b6c09dcf639.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffa01f03fb074bff35b35e07047d11b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9884f3d239fd9e6c188e0b6c09dcf639.png)
您最近一年使用:0次
2020-02-15更新
|
318次组卷
|
2卷引用:2019届重庆市江津中学、合川中学等七校高三第三次诊断性考试(文科)数学试题
名校
3 . 设变量x,y满足约束条件
,则
的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45ee9090ff427be39502cab266bc5cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69ea74904469c8782c590b08e09d6a20.png)
您最近一年使用:0次
2019-12-27更新
|
135次组卷
|
2卷引用:2019届重庆市江津中学、合川中学等七校高三第三次诊断性考试(文科)数学试题
4 . 定义在
上的奇函数
满足
,且当
时,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f48402431243ccf5e7e01edd64a0b8c3.png)
_____________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42b2897842d014a94af5f74c1c1c6035.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54297d09c19f29d92463d21928998266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c930dcbd1af033762395b6bd11111efe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f48402431243ccf5e7e01edd64a0b8c3.png)
您最近一年使用:0次
2018-08-10更新
|
1950次组卷
|
2卷引用:【全国区级联考】重庆市江津区2018届高三下学期5月预测模拟文科数学试题