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1 . 已知向量eqId2afa2d9bb3884033b198af61485b188a满足:eqId2a05971171a641b3a1bf229abe54d709.设eqId0190ccabb04442199a0237efc0ffb79aeqId857ee38b7a8e429fbd6d915d35f9e2ca的夹角为eqId6c9518e43fd5459798a30cfc10026e3c,则eqId4a810a9c392f4b44a47d6492e44a4421的最大值为(   )
A.eqId7f1f28503f41439586d8e228365897e9B.eqIdfea8cc8a9fb7479797de310ea9a90bd9C.eqId49b7b111d23b44a9990c2312dc3b7ed9D.eqIde4d58f42bad9461b93d451da718fc6f4
解答题 | 一般(0.65) | 2021·河南高一期末(文)
解题方法
2 . 已知向量eqId6595a083479a4aaab39eed4141b7dfb2eqId5f16eb46594d47b58ffc973b5cc2dd0deqIdf087b35a5011425daaafbf14a5e61064的夹角为eqId6c9518e43fd5459798a30cfc10026e3c
(I)若eqId859561cf9c36496d94499aeaaef5b5ff的最小值为eqId6b2724baa0064c51b2ba39f5b281a1eb,求eqId6c9518e43fd5459798a30cfc10026e3c
(Ⅱ)若向量eqId5636f6d8e30a4f45a79a490707fad537eqIdcbd9f26ede8f47b5a62962ab6f0ae1fdeqId42a74d8a0467402680f6022b187aad98eqId5f16eb46594d47b58ffc973b5cc2dd0deqIdfe72fe3d77e34f6e89f18aeb25a9a009的夹角等于eqId6c9518e43fd5459798a30cfc10026e3c,求eqIda9cd3f94eb8045438f75e9daccfa7200eqId072d7d6b911b42bc89207e72515ebf5f的值.
3 . 已知向量eqId7365fa1eaa9546db806d5b00c5cee9a4eqId30d00f4967ca42bcbaae55e0a30c0201eqIdb80a324e25594d368e3636dba38afb2d.
(1)若点eqId052844cae8574a8ab842c38a039baac0eqId8754ce8cf7f34f04abb9a0c041f57f5ceqId19a4eb16029e4550a14f2afe4741a3c3不能构成三角形,求eqIda9cd3f94eb8045438f75e9daccfa7200eqId072d7d6b911b42bc89207e72515ebf5f满足的关系;
(2)若eqIda9d8558290c64896b00f1c4577d0d92feqId6c2ac5c036c74647a680198b592d7958为钝角,求eqId51c6cda9e85840b58e57905066244b25的取值范围.
填空题 | 较难(0.4) | 2021·浙江高三二模
解题方法
4 . 已知向量eqIdbf80e33f8af0497793eeb1eb2a0e416eeqId26d0383ebc3f44c2984e80b88390a5f5eqIdae49f19446f74441819d6d86204153ba,若eqId1cd0540df19d4a3c9c9a4e895458a198eqId8d220037adbd44e4bbd7a57c719a9ae1,则eqId5c7463fcc05e40cea5741a1c7d044d1c的最小值是______
多选题 | 较易(0.85) |
5 . 已知不共线的两个单位向量eqId2e450008f3bd4354a978c85a922ea2aa,若向量eqId40b0b9156d4a4fc0922b5a499ecdb930eqId525695f3656d44eba18a5859b80d97c9的夹角为锐角,则符合上述条件的eqId4d2187284c5d4de29906363f7d21f60f值可以是(   )
A.eqIdbeffaaf8d5cd43cf8375210d69fce6beB.eqId37705e1ef6a84bbdbe88433e75932cdfC.eqIdc052ddfbd4524f67a79e0e77c2e5656aD.eqId8898c1dc81824f3098bbeae74e8f11fd
更新:2021/04/16组卷:339
单选题 | 一般(0.65) |
6 . 已知eqId3eb7762bb4004d8ba6c01e5de1dd46e3,且a,1,b构成等差数列,若向量eqIddc954c7175744915b3a936d6034e8d79eqId330e8dc6708f4506b0ed51cbe3cc6819,则eqId196aa2a385a24855b8bb9819f9f4983f的最小值是(   )
A.4B.3C.2D.1
更新:2021/04/16组卷:209
填空题 | 较易(0.85) | 2021·山东高三专题练习
7 . 已知向量eqId53e5510ee32b402cb04495e3a0b626a9eqId9996beed95704abdaa1e47215fdd5113,若eqId77fb5760af5849b99e9368809a4cd1ce,则实数eqIda9cd3f94eb8045438f75e9daccfa7200等于___________
更新:2021/04/16组卷:210
8 . 已知eqId3099f21e1db349dbbaf3889eb1756123eqId81bd4cfc0769498383f7a5ec3db28e2eeqIdce5dc568ba7b47eb8caf5b7e70179146,设eqId2381423d4cd146cab95f55527681a766是直线eqIda668e52822264c18a05bbdd44d38eb84上一点(eqId2efda802d5534f6d92d9f8af7aaec28b为坐标原点),求eqIdb5429ce9476c4411a29137905602691b的最小值.
双空题 | 容易(0.94) | 2021·江苏高一课时练习
解题方法
同步
9 . 已知A(2,0),eqIdbf80e33f8af0497793eeb1eb2a0e416e=(x+3,x-3y-5),若eqIdca4146670db345b48c386f4db94b34a5,其中O为原点,则x________y________.
更新:2021/03/19组卷:185
单选题 | 一般(0.65) |
10 . 已知单位向量eqId3d906e5d3e694363af29a999ce4871a6eqIdb8affe1d7571428283ab57a95ed2a84a满足eqIda0fdc24d2a9246eeb6ccd7c5a07ff786,则eqIde2fa8fa0b9934f89833916a687b0e0cc的最小值为(   )
A.eqId650bf73d6b904c6a9ee39b0dc18fea28B.eqIde4d58f42bad9461b93d451da718fc6f4C.eqIdd1ebfa5c81a04d18900d19595d070677D.eqId5f816d038c584dc7a249120298677ef3
更新:2021/03/17组卷:2272
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