名校
解题方法
1 . 如图,设
是平面内相交成
角的两条数轴,
分别是与x轴、y轴同方向的单位向量.若向量
,则把有序数对
叫做
在斜坐标系
中的坐标.
,求
.
(2)若
,求
在
上的投影向量斜坐标.
(3)若
,
,
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46c092d69df76faf1e2133dc96b466ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/111939547e581e8bf029a241b9e9cb05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b257fe21a91d22e853b1642c9d44647.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0203b006524305c3d8ee0b6c34cd872b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cec64476aaca08de0808afda3618109c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a9e1eb4c3226489d1344321b10b7de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57b446995eb26255eb446d6db87efc6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49ee77ca1e8ec0f06518f2dc6262afa8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b821a889623ac467c40df8af7bb7305f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252c8b84033aef7b05b220257d09f67a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f48b3c7ba65b9a647b8182d7dbaa83c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c2e8935b20333704fae873bf1ef5adb.png)
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2022-04-23更新
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6卷引用:江苏省宿迁市泗阳县实验高级中学2023-2024学年高一下学期第一次调研测试(3月)数学试题