1 . 在正项等比数列
中,
,
是
的两个根,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eb7d4db5d7994156d24c4d05cc04232.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e35eeaabd951fb09b2926807da3685b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5e5562c409c242b957d45d897d5beb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eb7d4db5d7994156d24c4d05cc04232.png)
您最近一年使用:0次
名校
2 . 已知函数
,若函数
有 3 个极值点
,则实数
的取 值范围是_______ ; 若
,则实数
的取值范围是 _____
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f9180806e001b88049b9441af6ad1d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcee20976de0e0e8c1ccd7a951674691.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb9facbec77e33a43dc5cec58eea852d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
3 . 函数
的定义域为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14145264fa90feb0717a14b8a5cd7d47.png)
您最近一年使用:0次
名校
解题方法
4 . 已知实数
满足
,则
的值是__________ ,
的取值集合是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1845c3646482ae17a78dba94c01352f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
您最近一年使用:0次
名校
解题方法
5 . 已知随机变量
,若
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6f9090552d3918b05e947859c4d1edf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5d92ab74c43bc012c54c323d1e30d13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/299d1cd86d8cf1d62fe94560594c2d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
您最近一年使用:0次
名校
解题方法
6 . 随机变量X满足
,则随机变量X的期望![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac87b4bd71432d757c7b78bbd6b2dcfd.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc47f3b70b4cfa3317e8320eff66b710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac87b4bd71432d757c7b78bbd6b2dcfd.png)
您最近一年使用:0次
7 . 用
这五个数字组成三位数(不同数位可以用相同数字),其中个位数字、十位数字和百位数字的和为偶数的三位数的个数为______ (用数字作答).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75aa14daeedd6fdea0de0ea16b1992a8.png)
您最近一年使用:0次
名校
解题方法
8 . 已知随机变量
服从正态分布
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/552595efb8eb89a970a1abbb0c955cca.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b204a6f61bd3e1085c3d50720c109561.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fe0171a0d4874966a49a88a702f25b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/552595efb8eb89a970a1abbb0c955cca.png)
您最近一年使用:0次
名校
解题方法
9 .
展开式中常数项为12,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71f8f91e28362304ad00aaf3cb03c3d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
您最近一年使用:0次
解题方法
10 . 已知等差数列
的前
项和为
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/530147419685f6091bf25a0b3e2662ab.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7cfb2cd804cdcb5acb9d129b66c281d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/530147419685f6091bf25a0b3e2662ab.png)
您最近一年使用:0次