11-12高二下·江苏泰州·期中
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1 . 用反证法证明命题:“三角形的内角中至少有一个不大于60度”时,反设是_______________ .
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2 . 某同学在电脑上打下了一串黑白圆,如图所示,○○○●●○○○●●○○○…,按这种规律往下排,那么第36个圆的颜色是( ).
A.白色 | B.黑色 | C.白色可能性大 | D.黑色可能性大 |
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2018-08-25更新
|
381次组卷
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2卷引用:广州市第41中学高二第二学期数学选修1-2《推理与证明》测试题
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3 . 设![](https://staticzujuan.xkw.com/quesimg/Upload/formula/222e26de21e5a823b605eb70a73c29da.png)
且
,
,
,
(1)求
;
(2)若
,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/222e26de21e5a823b605eb70a73c29da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d974bd8625075dfb0ce9382103008c1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81317b6ed916ff92982a1c2c44e5f9e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a487761713b03026b2b9c5b5984352fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/636d6d061589f4079285caca8a57cb17.png)
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4 . 若
的前n项和为
,点
均在函数y=
的图像上.
(1)求数列
的通项公式;
(2)设
,
是数列
的前n项和,求使得
对所有
都成立的最小正整数m.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/184a6d327a0d8ee359e74c2c5e2f257e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b36137931aba9d8250282ccd0e260776.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a27b515f1a285ff1286ac597cce326b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/463e670d40ac857529acb9ed92f43661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
您最近一年使用:0次
2018-08-25更新
|
982次组卷
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2卷引用:广东省广州市培正中学2017-2018学年度高二第一学期测试二数学(必修5模块)试题
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5 . 已知等比数列
中,
,
,
分别是某等差数列的第5项、第3项、第2项,且
,公比
.
(1)求
;
(2)设
,求数列
的前
项和的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b114e6c7d6f9a88a8d31532f91df0f95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45482d31d1d7448c9f3922b4d2a55331.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e764296a62a7def78e39370f746b4663.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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6 . 设
、
,
,
,以下四个命题中正确命题的序号是_________ .
(把你认为正确的命题序号都填上)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/464f1c9c677ec9f68d54883f3d325c64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c7a6dbedbf506b3d12c436a93d09aa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fac0fa99e164e2d9eefb9dfb2ddbafa.png)
(把你认为正确的命题序号都填上)
①若为定值m,则
有最大值
; ②若
,则
有最大值4;
③若,则
有最小值4; ④若
总成立,则
的取值范围为
.
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解题方法
7 . 在
中,
分别是角
的对边,且
,则
的值为_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f5573b30734d65648f61c0a94c98de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38335830b93ac4d99c28a8e209eecb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892f62eb71e7257ab6bf37fe69448d33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1311f32edf13f8caee5edb03f24a7ba.png)
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8 . 已知x、y满足条件
则2x+4y的最小值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9b2a4da5bcf71f88db62d9f8c01bfe3.png)
A.-6 | B.6 | C.12 | D.-12 |
您最近一年使用:0次
2018-08-25更新
|
638次组卷
|
4卷引用:广东省广州市培正中学2017-2018学年度高二第一学期测试二数学(必修5模块)试题
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9 . 在
中,若三内角满足
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d1f03bb4ed04733a7c970583a798e8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2a8bf5e05a07c93a7104839fc21849.png)
A.30° | B.150° | C.60° | D.120° |
您最近一年使用:0次
2018-08-25更新
|
818次组卷
|
2卷引用:广东省广州市培正中学2017-2018学年度高二第一学期测试二数学(必修5模块)试题
10 . 已知点
在函数
的图象上,且
,则数列
是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a44042d110ad8bf676c2785c2b1f9a04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b9f0b9e53a83e68f5fec944f343119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.等差数列 | B.等比数列 |
C.不是等差也不是等比数列 | D.既是等差也是等比数列 |
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