1 . 函数
,且
,若任意
,
、
、
都能构成某个三角形的三条边,则
的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71f506bdd761f527018046c720fca92a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3ac98c53999e2a492366cfb47d0a14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f77bab0f04e7a2c3e385dd7c1ec1b85f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc9769116ec47353514e6b7fb7b17216.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/542893790445d6d888d9ff91fd215c9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb1e5fb2d54a62f243bd5936a3f60386.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/628560d39eeb0339fa00c9c15ab2c095.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
2 . 下列命题中真命题的个数是( )
①若
,则
;
②
;
③若
,则
且
.
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5db64feb6bfa180fd4a1e3f346a105e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a93018f2b1ba3d04c0441c6a69ed4dee.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/575095ddf9644ff3c420c589f7b5fb7d.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c71a5eb30f17a79b8d7e603d6556208.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be06aa5f32133ab83d7210a75ea26801.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a42e1a3959563b55a6f6112dd75907f7.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
3 . 已知函数
,各项均不相等的数列
满足
,记
.①若
,则
;②若
是等差数列,且
,则
对
恒成立.关于上述两个命题,以下说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b923078510697d5f7f9ea392eb76dd9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb35f9410a819f3d153dfad2c92114f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f76a83b79d67e646580c7633bb974ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee9c808aa74de39cd029cc58d6fd8498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3007a67a411709ebb8b4cafcf78b8fc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7833c26d6d9d8871ecdba54c19c76a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f330dc5c6e69521f65659c9c6d002b85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
A.①②均正确 | B.①②均错误 | C.①对②错 | D.①错②对 |
您最近一年使用:0次
2021-05-24更新
|
985次组卷
|
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