解题方法
1 . 已知递增的等差数列
的首项
,前
项和
,且
,
,
成等比数列.
(1)求数列
的通项公式;
(2)令
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f30f56664446f32dbbc2c5f12a99374.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e191086446263b7bbbd93613577c42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2023-01-08更新
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2卷引用:吉林省长春市北师大附属学校2021-2022学年高二上学期期末考试数学试题
名校
解题方法
2 . 已知顶点在原点的抛物线C焦点坐标
,斜率为
的直线l与C相交于A,B.
(1)求抛物线C的标准方程;
(2)若
,求l的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/092fd1b1d33979818300cd2e3699bff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
(1)求抛物线C的标准方程;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47a393db942488ea4e94dc2ad34d328e.png)
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2023-01-08更新
|
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2卷引用:吉林省长春市北师大附属学校2021-2022学年高二上学期期末考试数学试题
解题方法
3 . 如图,在平行六面体
中,底面是边长为2的正方形,若
,且
,则
( ).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/27/4484d19e-7b6d-4f23-8856-aae50f49b872.png?resizew=138)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e322f79e083e471b34950b9ffabffdc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d541fb495b1ac5e176bdbd966040867.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/27/4484d19e-7b6d-4f23-8856-aae50f49b872.png?resizew=138)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
4 . 已知数列
的前n项和
.
(1)求数列
的通项公式;
(2)令
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bd7d3a4472a5f4a709299b8bdfd089e.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c30d676fc5bdd7602c046cad44329b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2023-01-08更新
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434次组卷
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2卷引用:吉林省长春市北师大附属学校2021-2022学年高二上学期期末考试数学试题
名校
解题方法
5 . 已知椭圆
,四点
,
,
,
中恰有三点在椭圆C上.
(1)求椭圆C的方程;
(2)过椭圆C右焦点F的直线l与C相交于A,B两点,在x轴上是否存在点P,使得
?(O为坐标原点)若存在,请求出点P的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f669a1d6376f795f05b47eb7d8067c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7fbf46db1c38fdcefdfca8777a92875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbdd68297be3e412c68d27457a9f8224.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b86c3b3b165037ec33db39e0f8ac4873.png)
(1)求椭圆C的方程;
(2)过椭圆C右焦点F的直线l与C相交于A,B两点,在x轴上是否存在点P,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45523947fefe4647873cf021e58d0ef4.png)
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2023-01-08更新
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2卷引用:吉林省长春市北师大附属学校2021-2022学年高二上学期期末考试数学试题
6 . 若
三个数成等差数列,则
( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/425b541b5869ef9b16ca20b692990f10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
A.1 | B.2 | C.3 | D.4 |
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名校
解题方法
7 . 如图,在正三棱柱
中,点
为
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/28/619a9ae4-925d-4d4f-af83-268918fa784c.png?resizew=142)
(1)证明:
平面
;
(2)求直线
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4bb9bdc8210cadb211e5e962191f4aa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/28/619a9ae4-925d-4d4f-af83-268918fa784c.png?resizew=142)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/002cc6a0373255f39172cdee62fb6b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41104641f3e2260d00aeadf8fb8a078a.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41104641f3e2260d00aeadf8fb8a078a.png)
您最近一年使用:0次
2023-01-08更新
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788次组卷
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5卷引用:吉林省长春市北师大附属学校2021-2022学年高二上学期期末考试数学试题
解题方法
8 . 已知如图,长为
,宽为
的矩形
,以为
焦点的椭圆
恰好过
两点,
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/27/b78ab523-88da-4bcd-bd9e-d072dc4bb876.png?resizew=169)
(1)求椭圆
的标准方程;
(2)根据(1)所得椭圆
的标准方程,若
是椭圆
的左右顶点,过点
的动直线
交椭圆
与
两点,试探究直线
与
的交点是否在一定直线上,若在,请求出该直线方程,若不在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f326db309ab6bf16acfab03080650c73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/27/b78ab523-88da-4bcd-bd9e-d072dc4bb876.png?resizew=169)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)根据(1)所得椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a948d2f7732d7f03e986c63712089b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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解题方法
9 .
,若存在互不相等的实数
,
,
,
使得
,则下列结论中正确的为___________ .
①
;
②
,其中
为自然对数的底数;
③函数
恰有三个零点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2741e34d86254590a42194e2944d467f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c2e17cd45e58e57152c6b1177b20fd8.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e23f593cd4b055a3f6b0705cd70a99e.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aafbef5666f675e3e0093d1fb0d869d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d896cc44a577f6290d713cfbca0e4ff3.png)
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解题方法
10 . 若命题“
,
”是假命题,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccd7af9298cd5ff19d8866fedb42ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2981424ced8dfd463618885c7a61303.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() |
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