解题方法
1 . 已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c18ac2817c37f1e8ceaf0b2ad0719945.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7c73c1ef3fc6763dbfb042719abaa63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c18ac2817c37f1e8ceaf0b2ad0719945.png)
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2 . 正四棱锥
的底面积为3,外接球的表面积为
,则正四棱锥
的体积为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d80f16c3278cd252725625dcf253cda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
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3 . 如果
,那么下列不等式成立的是________ .
①
②
③
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca24341509c05e672999202f2df0ebaf.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb54b1b3617ebc502cb44194cbcd1dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d13a828975535efba2e25cdcf71988be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f4020e809b61b33310386c6b598de0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53735663282ca04477d2a67976ce23a4.png)
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4 . 命题p:一次函数
的图像经过一、二、四象限的充要条件是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1af0b467f0e1ac18acdc39586d9a28ce.png)
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5 . 在平面四边形
中,
,
,
,若
为边BC上一动点,当
取最小值时,
的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae2a696b84492a736c5b444e61b7ad96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4795ee1f96b430529934e2231b38885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab7aaa871ceb78e5b80b531a7cf4f1c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe020f2d372f3bf21c9ef5c71895132c.png)
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6 . 如图,在矩形ABCD中,E是AB上一点,连接DE,将
沿DE翻折,恰好使点A落在BC边的中点F处,在DF上取点O,以O为圆心,OF长为半径作半圆与CD相切于点G.若
,则图中阴影部分的面积为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
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7 . 一次函数
与反比例函数
的图象交于点
和点
.当
时,
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41d49bb2fdf76bbf030f0749462ab208.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6db8dc0564b187f7adb8184f714ab5da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0898eaf39239999c25447d0512c95f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ceba3770a26f52ab88208d54605758e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f99df1a7b58018125b99578b779342.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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8 . 观察下列等式:
,
,
,
,
,
,
,…通过观察,用你所发现的规律确定
的个位数字是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/573cde866a43fa16637ef90f30f66dac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3195d9cd84a4d06ef1a6eb6bc026bdf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feae878a430a1b23774127547d842cb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e98ee95e5ee04de63ee34a524d5889d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef75ee6d803fb416fc4a655f25fdb648.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c7a54507c1804d2f6fd9ed10d0b7aab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b1682f430812c19cef89667c9baf7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/909e84920c6f33b3bbb97a25b42bb840.png)
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9 . 分解因式:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2176a0d87bfe0ead8c667d0fb43f2980.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2176a0d87bfe0ead8c667d0fb43f2980.png)
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10 . 北京时间2020年11月24日嫦娥五号成功发射,首次在380000公里外的月球轨道进行无人交会对接.请把数380000用科学记数法表示为______ .
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