1 . 已知函数
,其中
.
(1)当
时,求曲线
在点
处的切线方程;
(2)讨论函数
的单调性;
(3)若函数
有两个极值点
,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4525c6c4afaeefd1fdd097c1c1889ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5828873f8369183faf71181cda5b61d2.png)
(2)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a80def5c2a0fc585a0d6beb0492d904.png)
您最近一年使用:0次
名校
2 . 已知函数
.
(1)当
时,求
的单调区间,并证明此时不存在
,使
成立;
(2)若
在
上恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4affc461be09f780c9d83ab19bc0ab.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/133cb4bfa780967fce1ef6181f2cf545.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e38c541dec8fce1d26886e5ef7d21f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48350c9f896c18a64f27867ca81c9be2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
名校
3 . 已知函数
其中![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7156f93a21b3627d0c6ebadf66a107f.png)
当
时,求曲线
在点
处的切线方程;
讨论函数
的单调性;
若函数
有两个极值点
且
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb2a070c23b2b14042d4ad6cc0a595a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7156f93a21b3627d0c6ebadf66a107f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fb1feeee7cb80c1c861b6aa3f762889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62295c36d2e2174908c2bec0eb5b30f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c58cc80f792a9262c4da33fabd21e95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eec8165f723e6a54cf7f0495c7eeee0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93d21b8dea8a51ff4b82845a03549aab.png)
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4 . 如图所示,在三棱锥
中,
底面
,
,
,
,动点
在线段
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/4c9f929b-eb39-4002-8585-81212e580f27.png?resizew=126)
(1)求证:平面
⊥平面
;
(2)当
时,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98140559ade34a1cc55b93b6c8f3991d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4317430d5a2b61d9a2a88b73e7d7ad39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa3a310c1f8a5af35dc3328d874e18e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/865ca3c36ab3c83035ef7e29920a8e75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3e9ef3e849788645552cfb0735d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f144992e1cbee34868abce1e5ad38c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/4c9f929b-eb39-4002-8585-81212e580f27.png?resizew=126)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf126cfed85fa9b7720ec6f7b0008dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cee097d4fe948c3d4f1b5c28b24adf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4d787f1177ad5138bbebe1b4c64c998.png)
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名校
解题方法
5 . 如图,在四棱锥
中,
平面
,底面
是菱形,点
是对角线
与
的交点,
是
的中点,且
,
.
![](https://img.xkw.com/dksih/QBM/2017/8/29/1762653212663808/1765493685411840/STEM/1e4bf77e429343b9be4358656de3f096.png?resizew=244)
(1)求证:
平面
;
(2)求证:平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
平面
;
(3)当三棱锥
的体积等于
时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://img.xkw.com/dksih/QBM/2017/8/29/1762653212663808/1765493685411840/STEM/1e4bf77e429343b9be4358656de3f096.png?resizew=244)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280247d7df395bb9ea78c51e67b458d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(3)当三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71719fa9855745e17362dc00fe945ce2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/802e162b98c280720fcb909cf392fda3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
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名校
6 . 如图,四棱锥
的底面
是平行四边形,侧面
是边长为2的正三角形,
,
.
(Ⅰ)求证:平面
平面
;
(Ⅱ)设
是棱
上的点,当
平面
时,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/564505728a705cb596bd14ee7841c9ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c327b3e91d8bea53255d9308a952a276.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/15/d06b06c2-ed0d-4f6a-81c7-38a13005f320.png?resizew=219)
(Ⅰ)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1666b45ed176d648dd1764f4a2dbd73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532c7d9eb4015a630d0f2f5038991932.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67a534178e21e264e71ee2a3f7913914.png)
您最近一年使用:0次
2017-04-20更新
|
1075次组卷
|
10卷引用:黑龙江省大庆中学2018届高三上学期开学考试数学(理)试题
7 . 如图,棱锥
的底面
是矩形,
平面
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/ff98749f-f3cc-4026-9932-8d679f99f1ff.png?resizew=140)
(1)求证:
平面
;
(2)求二面角
的大小;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b10835116b9b777a666b438c907b49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e46571701ccaa18d3c844ab99ee6c30e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/ff98749f-f3cc-4026-9932-8d679f99f1ff.png?resizew=140)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21d9f756419912dd298a0d6857130c80.png)
您最近一年使用:0次
2016-12-04更新
|
475次组卷
|
5卷引用:黑龙江省大庆实验中学2018届高三上学期期初考试数学(理)试题
8 . 如图所示,在三棱锥
中,
底面
,
,
,
,动点
在线段
上.
![](https://img.xkw.com/dksih/QBM/2015/8/27/1572221833265152/1572221838540800/STEM/95e806c4906e4ed18f17cbeb1fb40c43.png?resizew=124)
(1)求证:平面
平面
;
(2)当
时,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98140559ade34a1cc55b93b6c8f3991d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4317430d5a2b61d9a2a88b73e7d7ad39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa3a310c1f8a5af35dc3328d874e18e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba22f09b5333973aa4a3e52c941ef6e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a566b100fb2ebe3d208f9b6527934218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1ac2e11788860424508ea9e80cf89d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2015/8/27/1572221833265152/1572221838540800/STEM/95e806c4906e4ed18f17cbeb1fb40c43.png?resizew=124)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95a55c40bb7437081d8e669974c8d1b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cee097d4fe948c3d4f1b5c28b24adf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4d787f1177ad5138bbebe1b4c64c998.png)
您最近一年使用:0次
2016-12-03更新
|
640次组卷
|
4卷引用:黑龙江省哈尔滨市大庆实验中学2018届高三上学期期初考试数学(文科)试题
9 . 如图,在四棱锥
中,底面
是正方形,侧棱
底面
,
,
是
的中点.
(1)证明
平面
;
(2)证明:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bba77c22664cbf2111ee2879bf944f31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a34a1a0354e836d4c88eeb7d2589283.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07cf478246d00cbffc6cd4dbee1eaffb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a34a1a0354e836d4c88eeb7d2589283.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77499408cec1e915abe3d778701061cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c59076e80b15755ef630fd5f40d1f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcd98ee0037900264471b4baa7e46e1.png)
(1)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c069f6740616939bc241ad4fe27437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e70bb6806a13ed3f2d55420290914ee.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bc68ac1ad3c8c44356b13c1ce1bf9dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f67f6fbf04545293ba77ca787eb22fd.png)
![](https://img.xkw.com/dksih/QBM/2012/3/16/1570807514193920/1570807519600640/STEM/c30884b155da4d2982fa0e5456cb30de.png?resizew=241)
您最近一年使用:0次
2016-12-01更新
|
4287次组卷
|
4卷引用:黑龙江省大庆中学2017-2018学年高二上学期开学考试数学试题
黑龙江省大庆中学2017-2018学年高二上学期开学考试数学试题(已下线)2011-2012学年福建省福州八中高一第一学期期末考试数学江苏省淮安市六所四星级中学2019-2020学年高一下学期联考数学试题甘肃省张掖市第二中学2020-2021学年高三上学期9月月考数学(文)试题