已知a,b,
,则“
”的一个充要条件是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33f306d2b261f4c39a9fc0858d96e647.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2023-11-28 07:12:21
|
相似题推荐
单选题
|
适中
(0.65)
【推荐1】下列结论中正确的是( )
①设
,
是两条不同的直线,
,
是两个不同的平面,若
,
,
,则
;
②
是函数
取得最大值的充要条件;
③已知命题
,
;命题
,
,则
为真命题;
④等差数列
中,前
项和为
,公差
,若
,则当
取得最大值时,
.
①设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fe920cd78db25f5b4df37d066e57800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80645381feb9746cc149da61d553974a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9d6ca6fed060a95127579051f7a6b79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5986f2991d45fbf3578f08f27d9fd7e.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6461468072bd27afd53fd5f9c3bf344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eae79e47bea73741ad1cceff1995381.png)
③已知命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bea9702708f8463975c94119fa50f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f509cbfa2dc0d829e9c3d679dac30d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0228cd18bf02efbba011d7b79ba9306b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a252bcc22540b44485125d23e04f93a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abb9d57cbe246df4aa7b2e12e4aed9ed.png)
④等差数列
![](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/d2d8bbb4a09e0ac86bbae46222a90841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4c641bc9997d65b7ec9b2640029a147.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24d8ff50244476a0023d3bf3bdc0cf75.png)
A.①③ | B.①④ | C.②③ | D.③④ |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】下列命题中,真命题是
A.![]() |
B.![]() ![]() |
C.![]() |
D.命题![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐2】设
是非零实数,若
,则下列不等式成立的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b07bd5bd1885d7a32e2c33e9619010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】下列不等式:①
﹔②
;③
;④
,其中恒成立的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61873626c729b6ffb54ab57f443ca7f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb8274d629b75abcd6818a7a0200d15d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46973ec354692c420913269bc23a8035.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd1f492b5584a56dd95203774b8bc99a.png)
A.①④ | B.③④ | C.②③ | D.①② |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
解题方法
【推荐1】已知
,则
的大小关系为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6566b0f40b56ea5a6541be3abdfb03a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
解题方法
【推荐2】已知
,
,且
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54dad48527a47eab4a5916ab0421cc71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b21208364124b5c477b2ff8df1c2e8f.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次