若
,且
,
,
,则
的值是____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b8234008ba046d7588346655fa7a99a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc4d9dbd884a3c708b02dddd93cba103.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac69e6db1df13ed64756b4f391ae9fac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
2022高一上·全国·专题练习 查看更多[2]
更新时间:2022-07-17 07:46:47
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解题方法
【推荐1】已知:
,用
表示![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1d340f31ad0fbcd540966eeb3bae93.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b303971addf7d5632eb3ca7184404030.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
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【推荐1】碳14年代检测方法是指通过测定被测物中碳14的含量,并通过该含量来推测被测物的大致年龄的方法.已知被测物中碳14的质量N随时间t(单位:年)的衰变规律满足
(
表示碳14原有的质量).2021年3月23日,四川省文物考古研究院联合北京大学对三星堆4号坑年代,使用碳14年代检测方法进行了分析.经过测定,被测物中碳14的质量约是原来的
,据此推测三星堆4号坑距今约______ 年(结果四舍五入保留整数).(参考数据
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a80fb350784c61e228a76a89e1c18825.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4ccd4537f4dee2050ade38b972eb9b9.png)
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【推荐2】已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba47bb1ccc350c2dccec079b656d175e.png)
______ (用
表示);![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb1b35a03ada45a2b2f6c4399ca439b4.png)
______ .(用整数值表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f5270182cb8d9539a3d362985a411e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba47bb1ccc350c2dccec079b656d175e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb1b35a03ada45a2b2f6c4399ca439b4.png)
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解题方法
【推荐1】若
,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2af2b44f8b42772f9834b39fe5b3bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/547b5d4315e2130fa53173e53e28d0ff.png)
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【推荐2】已知
,求出方程组
的所有解![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e43ea237be99e64dcec90aabd38aad5.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69ee6696dee035519e1ba7fb78269830.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60da4fb2c95e1d9b6ea6a4e83d5c9965.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e43ea237be99e64dcec90aabd38aad5.png)
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【推荐1】已知
且
,下列各式中最大的是_____ .(填序号)
①
;②
;③
;④
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c212d62534a869dfa2be0544f520890.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2958030ec9d7543dda1f529593a915e2.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c925be255ca736a53b24d13ddede1a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92db8e1e24c0ca83f98aa6d44b35852e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a025f648f3051e60bb8924dc0bfb313f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
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【推荐2】已知
、
为实数且
,有下列不等式:①
;②
;③
;④
;其中恒成立的不等式序号为___________ .
![](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/9eae9ba258299eb489b490594397e23c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/775da52de420f9cb8576daae625b0435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5ef1faed0582b0105eddbd934b15556.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa23408bcc9f6200f22a310e5f2569a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/415b170f0664bf26e04598e599952bd1.png)
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