1 . 已知
,
是平面内的一组基底,若向量
与
共线,则实数
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f5ff3f025cd8b973d12739f1a7a2738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b89e68596a82c87ab48aeee98fd0533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
2 . 已知
的内角
,
,
的对边分别为
,
,
,若
,则角
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82363cff15cf923bf0a58093035c8b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f1e5d29de6e4d72bfed62d9c14dde5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3 . 已知一个水平放置的四边形
的斜二测画法的直观图是菱形
,且
,
,则原四边形
的面积是______ ;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d609847e2ff3d64e5a514582c3ead0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e988e3a0ca128ded803c48e7baa69ba8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/510a1959405792d989f668757a8fc1fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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解题方法
4 . 已知复数
,其中
为虚数单位.若复数
为纯虚数,则实数
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95803c4646401b87e4de9aa2bee9c549.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7035cd4adda5d72a9fc9f9fda75995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
5 . 已知复数
,
,
,且复数
,
在复平面内对应的点分别为
和
,
,则
的取值范围是______ ;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68f652b4c13657ffddf3c9e7eb262b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa224ed9be8766a4d0b5138bd57de0f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a67a742d2a43e907fb1c3a1bdf1d6a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68f652b4c13657ffddf3c9e7eb262b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa224ed9be8766a4d0b5138bd57de0f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f20c504a268aea14d4335027e7964b8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91a3cc7aec1b7d443f194cfb714c8f28.png)
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解题方法
6 . 大衍数列,来源于《乾坤谱》中对易传“大衍之数五十”的推论,主要用于解释中国传统文化中的太极衍生原理,数列中的每一项都代表太极衍生过程中曾经经历过的两仪数量总和,它是中华传统文化中隐藏着的世界数学史上第一道数列题目,该数列从第一项起依次是
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a654d545b4d2e1005ec42810d6cd1cbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92895fb9308ca200894e35cabed54fdc.png)
A.数列第16项为144 | B.数列第16项为128 |
C.200是数列第18项 | D.200不是数列中的项 |
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解题方法
7 . 已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc005c6da4925f8f1c01982bcc95c83e.png)
(1)求
;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc005c6da4925f8f1c01982bcc95c83e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/730f6171f50988ffe8dc2221842b4377.png)
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8 . 若直线
,则直线
的倾斜角为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6db0a1cbf7b0ed76c443b953af8734d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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9 . 已知
,则该圆的圆心坐标和半径分别为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d81c22b4aa1f8697a8d480091c073f8.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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10 . 若方程
表示椭圆,则实数
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea7090c4797cc0b4517b0c5f1d87cdae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() | B.![]() | C.![]() | D.![]() ![]() |
您最近一年使用:0次