真题
1 . A.选修4 - 1:几何证明选讲
如图,在四边形ABCD中,△ABC≌△BAD.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/2fb8b93f-94db-4268-8eb7-7406b5fa70c1.png?resizew=150)
求证:AB∥CD.
B.选修4 - 2:矩阵与变换
求矩阵
的逆矩阵.
C.选修4 - 4:坐标系与参数方程
已知曲线C的参数方程为
(
为参数,
),求曲线C的普通方程.
D.选修4 - 5:不等式选讲
设
≥
>0,求证:
≥
.
如图,在四边形ABCD中,△ABC≌△BAD.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/2fb8b93f-94db-4268-8eb7-7406b5fa70c1.png?resizew=150)
求证:AB∥CD.
B.选修4 - 2:矩阵与变换
求矩阵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efa537c9a8b597c99e7fc6165843593b.png)
C.选修4 - 4:坐标系与参数方程
已知曲线C的参数方程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/624ae69d616d8118c4e196d5658f4e8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fff6e7e2b9f2b68b1647f6350b98dc8.png)
D.选修4 - 5:不等式选讲
设
![](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/d318a788e491a9169b56ba90cf4dbe7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662c2bb1fdc296fcd2effd0a9b45fe06.png)
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