已知函数
(其中
),
.
(1)若命题![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
是假命题,求
的取值范围;
(2)若命题
,命题![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40a01f316dd76fedb4c52895ee09f9e2.png)
满足
或
为真命题,若
是
的必要不充分条件,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4ca95dc8969f707813fb274e73449e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bd2e8310219ce71e675413a05eb9cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7480a34547000884d7121838fcd4a04d.png)
(1)若命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe841bd928ff1e0866c749f8121bf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/183279b2b5f45e8be9860e238c370ec1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40a01f316dd76fedb4c52895ee09f9e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/2016/2/24/1572497088020480/1572497094090752/STEM/2f8a1de6787b4c24af149221914cfaa5.png)
![](https://img.xkw.com/dksih/QBM/2016/2/24/1572497088020480/1572497094090752/STEM/9694c0eec1e94ddbbf4f6c7b12d5a35c.png)
![](https://img.xkw.com/dksih/QBM/2016/2/24/1572497088020480/1572497094090752/STEM/a4aaf82f688b48aca7b7f81ab2198626.png)
![](https://img.xkw.com/dksih/QBM/2016/2/24/1572497088020480/1572497094090752/STEM/139cc835186747309df478b53a5bc404.png)
![](https://img.xkw.com/dksih/QBM/2016/2/24/1572497088020480/1572497094090752/STEM/07cf52bd4f35453c964f5536d3645205.png)
更新时间:2016-12-04 02:36:26
|
相似题推荐
解答题-问答题
|
较易
(0.85)
【推荐1】判断下列命题的真假,并说明理由:
(1)若
,
是任意实数,则
;
(2)若
,
是实数且
,则
;
(3)若
,则
有两个不相等的实数根;
(4)若
有两个不相等的实数根,则实数
.
(1)若
![](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/c60fc3e9456f71b31807e17c03ea0ae9.png)
(2)若
![](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/c988d709ba8cd8aed6cb83d76c0ba89c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea5977232839b54df456aeeacb13512d.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac671e6d87de2fb5f7ad3aab582866d.png)
(4)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac671e6d87de2fb5f7ad3aab582866d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐2】写出下列存在量词命题的否定,并判断其真假.
(1)有的素数是偶数;
(2)
,使
;
(3)至少有一个实数x,使x3+1=0.
(1)有的素数是偶数;
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1485a4756c56f1126b9825d5019d544c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2466a09fa839b3ba9a7d6a87fdb5be26.png)
(3)至少有一个实数x,使x3+1=0.
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐1】设集合
,
,
为实数集.
(1)当
时,求
;
(2)记
,若
是
的必要不充分条件,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb4c27569b9a654fdcbcd4450d8e6593.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a4c6ee14d3e556aedac5f5748bedaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aed39f5aca78934fb383402433fe549.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/937f2cbca197188f89485bee59226cf8.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1172c80b0d9bcb52d4071f27171819ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐2】已知集合
,集合
.
(1)当
时,求
;
(2)若
是
的必要条件,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3df6c554497c6277e339af8184dafc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a669f04639da35e58a18a81a8901ae3e.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/318212b9ba5866ba3fd6f4327526443f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed006b944ea64f970fee46e2f558467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e23af61cd402b3789af2401bde9cbefe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次