14-15高三上·四川成都·阶段练习
1 . 若正实数
,满足
,则
的最大值是
![](https://img.xkw.com/dksih/QBM/2014/12/26/1571936454918144/1571936460562432/STEM/4215de93d590490faee2a1e1fb9a449f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c960b0701c2f0ab88001307df36ec164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88584cf1df43e28d03592c7998b1653.png)
A.2 | B.3 | C.4 | D.5 |
您最近一年使用:0次
9-10高三·四川成都·阶段练习
名校
2 . ①若
,则
.②若
,则
.
③若
则
.④若
则
.
其中正确命题的个数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f4dd37454a4d8a8ab9321f3ce1e85bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/443dd938cf51421ff3a000d50b56eded.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd5a784d15393607164f20a71f656eb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fef331f94cef74af7a625084adbbafdd.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eefa75e187eb6a889f65d1b7dea1a81d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8cf14982900b008c48eebcc77a1d5ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35ecdcfd26b89c12fcff8918fce6a6d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a92eab4a813eeaf0a5c04111c81148cc.png)
其中正确命题的个数为
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次