2024·全国·模拟预测
名校
1 . 在
中,
分别是角
所对的边,
为边
上一点.
(1)试利用“
”证明:“
”;
(2)若
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(1)试利用“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/206bc3c5c7f06544ebc6fea332a1e355.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cac2e0bda3b5fd4591523e4d5e3bcd73.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39a5db0f7970a27d651ed8ae0b4f3662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2024-01-14更新
|
360次组卷
|
3卷引用:广东省广州市培正中学2024届高三上学期第二次调研数学试题
解题方法
2 . 设定义在区间
上的函数
的图象为C,点A、B的坐标分别为
且
为图象C上的任意一点,O为坐标原点,当实数
满足
时,记向量
,若
恒成立,则称函数
在区间
可在标准
下线性近似,其中
是一个确定的正数.
(1)求证:A、B、N三点共线
(2)设函数
在区间
上可在标准
下线性近似,求
的取值范围;
(3)求证:函数
在区间
上可在标准
下线性近似.
(参考数据:
2.718,
0.541)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3009e1faa07303307a2286d207c621b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5143b1450a8e592b392091169b06c41b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eefea6220e89c829c2a186271106cbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2b58891e1465e384a18d76e6228165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed85566b3fe972db7b93b80443c8703b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7edcb7f2de85c1b2f5e6b646e5f0719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3009e1faa07303307a2286d207c621b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(1)求证:A、B、N三点共线
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/318a16f1950d06e5500c76d8f81a507f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0186693faf138a7a6ba6f432b9eadaab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)求证:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/914a49b0d7aedc593a3e87fbab7c31ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8088d058b1089c5e78f758a437f6a7d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36cb3767bf1cc7b8ffd5ab9099a19269.png)
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a3ef0e187ba97b815c37f2dc2847b4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/088cb9a89f9a5abc3f69471f5b6b02c5.png)
您最近一年使用:0次