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单选题设点是某直线上的两点,则该直线的对称式方程为( )

A.

B.

C.

D.

考试-高数2（理）课程封面

学科：考试-高数2（理）

时间：2025-06-23 11:19:37

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设<img src="https://tihai-oss-cloud.itihey.com/img/f360bbaae39db690ab496d469fdaeafe.png">,<img src="https://tihai-oss-cloud.itihey.com/img/90ecad93264cf5c58edc488527eb65d3.png">,则<img src="https://tihai-oss-cloud.itihey.com/img/80bda6f255fd227a5ed04624d16403e0.png">等于( )

A. -3B. 3C. -4D. 4

<img src="https://tihai-oss-cloud.itihey.com/img/4a5cdb87f94b86b659b7086a2d4c75aa.png">

A. <img src="https://tihai-oss-cloud.itihey.com/img/496d83b50f9c768701748b4c7552a014.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/14e09770a0ca5d750b09c6fcd93b813a.png">C. (3,<img src="https://tihai-oss-cloud.itihey.com/img/17b97d11480fc44ef33519bd316edeca.webp">6,1)D. (-3,<img src="https://tihai-oss-cloud.itihey.com/img/191845134d13651c53f4a86cb7a52e0d.webp">6,-1)

<img src="https://tihai-oss-cloud.itihey.com/img/db8f8ec091ff645880cb8d0f0cf3d184.png">

A. <img src="https://tihai-oss-cloud.itihey.com/img/a9d700cb34a20ced3495dee4ced20e0d.webp">B. <img src="https://tihai-oss-cloud.itihey.com/img/5d0fb590900884861b38d481ebad5959.webp">C. <img src="https://tihai-oss-cloud.itihey.com/img/4c2050f2df5b7159d1b9925c66769b11.webp">D. <img src="https://tihai-oss-cloud.itihey.com/img/060cf6673d1f4c1736cdd0c4c2176a42.webp">

过点<img src="https://tihai-oss-cloud.itihey.com/img/f6565788a054861d155b05e4270a52d5.png">,且法向量为<img src="https://tihai-oss-cloud.itihey.com/img/d931a463dc2507b23e0058de3fa6c6cb.png">的平面方程为( )

A. <img src="https://tihai-oss-cloud.itihey.com/img/4d2304690be57a7d4f470213f534ede1.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/e4f4ef141bb35dbc887166ccdb9aa105.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/db63fa7ddfffeef89e505f17820e7a10.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/82c3b1438a148ea91061beef0c55b68c.png">

平面<img src="https://tihai-oss-cloud.itihey.com/img/8e3e70ea39da4257af558a157e80e11d.png">的截距式方程为( )

A. <img src="https://tihai-oss-cloud.itihey.com/img/17d294b81cb6deb563cddf1eb4d26526.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/3289c0825dd5e1927bbf630a9cd02320.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/848b38bb64ce6823e7ff7bb6446b6448.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/bac76d70be91766ba79959c933d1326f.png">

<img src="https://tihai-oss-cloud.itihey.com/img/999a80798e8bd2ab616cc4bfa53c1395.png">

A. 2x+7y-3z-4=0B. 2x+5y-3z-4=0C. <img src="https://tihai-oss-cloud.itihey.com/img/3f225513e337501e388c8a18b8be858b.png">D. x+7y-z-4=0

<img src="https://tihai-oss-cloud.itihey.com/img/d47e03a0996972877d771d1d86f38c13.png">

A. <img src="https://tihai-oss-cloud.itihey.com/img/e6df564bdf68b24db4c601be57f29779.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/d4bec93f39ff061714b772ad1dd4af5f.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/9c14922826ce030280a1524ab10fcb79.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/b31ff300d0f56e9f8a4279096e45ffaf.png">

点<img src="https://tihai-oss-cloud.itihey.com/img/fe6b619bb8041c4842ebe8798f0a939b.png">到平面<img src="https://tihai-oss-cloud.itihey.com/img/db312ced03149f0c5bfef1bcaa303a93.png">的距离为( )

A. <img src="https://tihai-oss-cloud.itihey.com/img/0335e06c48ce3646a5ac0917257c7dd1.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/2e8f79924e662d42666c39c4bd275b94.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/4640d3c419a0cafb85c21e27b82033fa.png">D. 3

与其它平面不平行的平面为

A. x+2y-z+4=0B. 2x+4y-2z-4=0C. -x+2y+z+4=0D. x+2y-z+5=0

设点<img src="https://tihai-oss-cloud.itihey.com/img/4bf2d63c4acfae3b278c902657ee141e.png">是某直线上的两点,则该直线的对称式方程为( )

A. <img src="https://tihai-oss-cloud.itihey.com/img/37badfebb77c9cba2883000ea6013e50.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/f7a524fc938742665dd8f256b2762ca6.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/c9144b2a0a2830763a083206283c2680.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/a16dc28bc22765ba2591745db05be412.png">

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