名校
1 . 计算
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a247a58c19921f43de886bdcf7ad7b8.png)
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a247a58c19921f43de886bdcf7ad7b8.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218dfb70bdc9563f24bae1f0ffef2278.png)
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解题方法
2 . 已知数列
满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa2a843cf74a0e46eb59f7423e9acb55.png)
,且
,则
=___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa2a843cf74a0e46eb59f7423e9acb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a0c0dfc260a0a9ff442d991411a90d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e04ba1f389e23aa2b8f212497fcb94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffbb2af2309341bb458ccf28de27b363.png)
您最近一年使用:0次
名校
3 . 天文学中为了衡量星星的明暗程度,古希腊天文学家喜帕恰斯(
)在公元前二世纪首先提出了星等这个概念.星等的数值越小,星星就越亮;星等的数值越大,它的光就越暗.到了
年,由于光度计在天体光度测量中的应用,英国天文学家普森(
)又提出了衡量天体明暗程度的亮度的概念.天体的明暗程度可以用星等或亮度来描述.两颗星的星等与亮度满足
.其中星等为
的星的亮度为
.已知“心宿二”的星等是
,“天津四”的星等是
,“心宿二”的亮度是“天津四”的
倍,则与
最接近的是( )(当
较小时,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4600237e45126b576c48a61fdf38676d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/036d488bf35adf17250a56011df59d56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ffb27c570cdcc1dac09ec4f3c3a3a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2296ca77ea7369adcaca52a37393ad13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a584b6ad5577ab3e2d22caf23e3c32b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ff09f7d08e47462dd116b6999f3cc80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a75542332fbd5781bb04085f31b5335a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c7bb4c9ee43dbf9efe04facd3677dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d5d6ec804afed3ea6fd4aa3b312d0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4627755537a227cbfa5171f7522268c4.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-04-09更新
|
921次组卷
|
5卷引用:黑龙江省漠河市高级中学2020-2021学年高三上学期第三次摸底考试理科数学试卷