(1)“
”为假命题,求实数
的最小值;
(2)已知
,证明:
成立的充要条件是
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fb68148fd74b39769f0a129797d0bd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eae9ba258299eb489b490594397e23c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be97cd1c7111b654d87d8fbb63b6a84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4bd1b2b062bb5ae8e14fb2ffd885de7.png)
更新时间:2021-10-24 23:44:27
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】已知
,
为实数,命题![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4718c13be8bd32a8b70a4ccdcdfb9bb3.png)
(1)求证:命题
成立且
的充要条件是
,
;
(2)若
成立,求
的最小值,并求此时
,
的值.
![](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/4718c13be8bd32a8b70a4ccdcdfb9bb3.png)
(1)求证:命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12b40b1544e62be8b9e9f4dc9f2c0c74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d94a58b8110ff76aab48ffe5716d1dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c60cc80df6500d09b39e28edb49a9f30.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31567140cfb3d72b3060e3876b7e6cf2.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
解答题-问答题
|
适中
(0.65)
【推荐2】对于有限个自然数组成的集合
,定义集合
,记集合
的元素个数为
.定义变换
,变换
将集合
变换为集合
.
(1)若
,求
;
(2)若集合
,证明:
的充要条件是
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65bb5e26970b881094ac695df77f8dad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0928441297e887330350a46dd2b40841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4f30fe128cb72f71b144937e4093d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b403fc36865ed11b00995a8321e52b9.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4fa7f541be676dee0b2f9ec7ad965db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344d95d02bc0b476768fabe18105289b.png)
(2)若集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a73c3868106b393f210612c765c73c9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cae9155c585d74c8ff72beccaec601c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2216940861922a85b6a947a4317ef753.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】已知命题![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
,
,命题![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
,
,若
假
真,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ad5fe274cfc8da2dacfb65801f344ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4de5325d7f65ec389930941405b3bf5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccd7af9298cd5ff19d8866fedb42ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b8e219653eb6e1021bb62cec6dfdf84.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/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】设集合
,
.
(1)若
是
的必要条件,求实数
的取值范围;
(2)若命题“
,
”为真命题,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971d1e9ca93cfbb61e34c89ba4f79601.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12882b80aceaa3e5ae6cbb5f2a46b84e.png)
(1)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)
(2)若命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0a348e1ffe1579492a3fdcf09b0696e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41ce652364df17277b8f97d790ca6a93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次