21-22高二·全国·课后作业
名校
1 . 下列四个命题:
①命题“
,
”的否定是“
,
”
②
,
是两个不同的平面,
,
,
,则
.
③函数
为
上的增函数.
④
.
其中真命题的个数是( )
①命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc1077592ba24521a7a16d5de7993103.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0c7a319f1fb9ef4cd6bd9eb5ab0c53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b89f63dc9d7cbd7837c94d604ee5955.png)
②
![](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/a5986f2991d45fbf3578f08f27d9fd7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c36e0eb09231aef187aa2c4f0ae26b98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb26a220ed44c446105df7caa0f1063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1b610e3c5b3d78a5730e7f3d736ac28.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f8585ca73a54d7d43f2a7b234a7eb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3de1fb24a00c1744c6a946aec3fe9595.png)
其中真命题的个数是( )
A.0个 | B.1个 | C.2个 | D.3个 |
您最近一年使用:0次
20-21高三·江苏·强基计划
2 . 比较
,
,
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6525fae40d05832fcffdd7eb4259c3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5991e9ec7666f533a528a4173c58f0ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7d51c40d15c6b6c66cc74dba6965507.png)
您最近一年使用:0次
名校
解题方法
3 . 柯西(Cauchy,1789—1857)是著名的法国数学家.我们把函数方程
称为柯西方程,满足该方程的函数
称为“加性函数”.请写出一个在R上单调递减的加性函数___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab0c6f119137e1b6760d55956d99d963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
您最近一年使用:0次