1 . 给出以下命题:
(1)若数列
存在极限,则该极限唯一;
(2)若直线
的倾斜角为
,则
的斜率存在且为
;
(3)设向量
与
的夹角为
,若
,则
为锐角;
(4)到
轴、
轴距离相等的点的轨迹方程为
.
其中所有正确命题的序号为
(1)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
(3)设向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c1e552a1451270703a86e592d7dd656.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(4)到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54934d97f4087dfaf4302ea3914a9632.png)
其中所有正确命题的序号为
A.(1)(2) | B.(2)(3) | C.(1)(4) | D.(2)(4) |
您最近一年使用:0次
2 . 给出以下命题:
(1)函数f(x)=
与函数g(x)=|x|是同一个函数;
(2)函数f(x)=ax+1(a>0且a≠1)的图象恒过定点(0,1);
(3)设指数函数f(x)的图象如图所示,若关于x的方程f(x)=
有负数根,则实数m的取值范围是(1,+∞);
(4)若f(x)=
为奇函数,则f(f(﹣2))=﹣7;
(5)设集合M={m|函数f(x)=x2﹣mx+2m的零点为整数,m∈R},则M的所有元素之和为15.
其中所有正确命题的序号为
![](https://img.xkw.com/dksih/QBM/2016/3/9/1572527574966272/1572527580913664/STEM/d6c4946fa2df44d59215134ecd894ffc.png)
(1)函数f(x)=
![](https://img.xkw.com/dksih/QBM/2016/3/9/1572527574966272/1572527580913664/STEM/2ce08fb7ff9c41bfa25e9f7ed735248e.png)
(2)函数f(x)=ax+1(a>0且a≠1)的图象恒过定点(0,1);
(3)设指数函数f(x)的图象如图所示,若关于x的方程f(x)=
![](https://img.xkw.com/dksih/QBM/2016/3/9/1572527574966272/1572527580913664/STEM/8e4ea6ff0e84412f8d02caff43aace53.png)
(4)若f(x)=
![](https://img.xkw.com/dksih/QBM/2016/3/9/1572527574966272/1572527580913664/STEM/3223b5abdfc24770bf25465e31631e88.png)
(5)设集合M={m|函数f(x)=x2﹣mx+2m的零点为整数,m∈R},则M的所有元素之和为15.
其中所有正确命题的序号为
![](https://img.xkw.com/dksih/QBM/2016/3/9/1572527574966272/1572527580913664/STEM/d6c4946fa2df44d59215134ecd894ffc.png)
A.(1)(2)(3) | B.(1)(3)(5) | C.(2)(4)(5) | D.(1)(3)(4) |
您最近一年使用:0次