组卷网>知识点选题>利用坐标运算法求平面向量数量积
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2 . 已知点eqIdbedf755e0fdb4d078d6859360706b163是边长为eqId29c898c2f6d5480e84ed6cd0dfc0930b的正方形eqId5ce7a06ae7a34393b92b5277978ac014及其内部的一点,实数eqId7325f59d822c4c318b79153587a4f903满足eqId13fc3d5e30b3407fbca72f97dee80d89.当eqIde144786ba96046aca424be8a286c3a97取得最大值时,数对eqId7c63ce5a6ad24145aa17f81bb4a10324可以是_____
4 . 在直角梯形eqId5ce7a06ae7a34393b92b5277978ac014中,eqId6bcdd2ee36c54403b8981b3d682dcf55eqId686612a3629141cca688664f84d38e77eqId18e3ae3e255349039d6726b8293c6cabeqIdcbe55836c9074c289166f94376874c93eqId06a9b21d812d480aa034b120f6ca33a4,点eqId63db14a5b4334f3ea583c8fb12b0d175是线段eqId99a3187c2b8f4bcc9703c74c3b72f1f3上的一点,eqId2e472e2834814474a91b8ffcdc28fbcf为直线eqId0627be51821d4be7b3e024a354815d64上的动点,若eqId0f388150b736449eb4eec19a15e231adeqIdb3010eb5ec7a49e1a10f1064fae83c2c,且eqId4697c73ab63641369905c5e86090efa1,则eqId971920d3f9264d32a2374d106fd2bac4的最大值为(   )
A.eqIdda3fe57e250a4b619aa9e3418e1534a4B.eqId9a2b12b0d2864b11a83d9ce4204a3512C.eqId4af26df1d7914ec690b07a366a42c903D.eqId2a2b8c131ef74c8dbf997082598680a7
6 . 在梯形eqId5ce7a06ae7a34393b92b5277978ac014中,eqIdc1f6247143e74ee5a542daba2b5ee45feqId66882e08621d437ab3d020f5f86d807eeqIdbe50f8dd399f4e8f90510feab89fa650eqIde758ea04d4f5438f8b71e73740dfe832eqIdcf2da96900c948a1b3ce7cbfd420c080eqId1b51efe7c2fa42748ac5a6be262e2fa4相交于点eqId93cbffaa5ae045d6ac45d1e979991c3aeqId303e65834399497295edba05f0e17b1a,则eqId06dd3eed2ecd48fbab5fe05ab14b9e72(   )
说明: figure
A.eqIdfd159ce4fcdc4f77b859e542ad7f8a12B.eqId369084490b3642e19cb375a848f9fd84C.eqId3b29afc35d5a4bdfab8a0674ec37b12dD.eqId5c1c12d4b3ba4aaab6267324ae66c81e
9 . 已知向量eqId44b41c839b4d464b8ed35a59ff1bac56eqIdc725ce1cd3e64e288b78fb2d6d2aba4a,函数eqIde69db56ca1ee4272b0457524c9f92a0d,则(   )
A.当eqIdcd417b810d7840698ef8d00a3f9ef251时,存在着实数eqIda9cd3f94eb8045438f75e9daccfa7200,使得eqId48484912be7741e9a5aa70ccea25c3e5
B.当eqIdcd417b810d7840698ef8d00a3f9ef251时,存在着实数eqIda9cd3f94eb8045438f75e9daccfa7200,使得eqId3354fe4e9ad04d1ea1780fcce00b9577
C.当eqIda247cabb0ebe48bb8ab8a495b7f2341c时,函数eqId6f13759e937144069819aed2ae5a1057的最大值为eqIde4d58f42bad9461b93d451da718fc6f4
D.当eqIda247cabb0ebe48bb8ab8a495b7f2341c时,函数eqId6f13759e937144069819aed2ae5a1057的最小值为eqId232536b8bbed4f619f81f098fe3ebb9c