登陆题目详情
单选题 设函数
在点(x,y,z)的某邻域内可微分,则函数u在该点沿着方向
(其中
为
的方向角)的方向导数
=( )
A. 
B. 
C. 
D. 
学科：高等数学（下）知识点汇总与典型题解析（黑龙江联盟）
时间：2023-05-07 10:32:27
相关题目
相关作业
题目1判断题
<img src="https://tihai-oss-cloud.itihey.com/img/e47268d7e8e7e2faef2b2a17d9b54758.png">A. 对B. 错
题目2判断题
<img src="https://tihai-oss-cloud.itihey.com/img/16ede1fe04807057d6a8cdfb3a44f241.png">A. 对B. 错
题目3单选题
<img src="https://tihai-oss-cloud.itihey.com/img/1364b64aa0f241a39409b3cd6ff46bf0.png">( )A. 不存在B. 0C. 1D. ∞
题目4判断题
<img src="https://tihai-oss-cloud.itihey.com/img/d1c726bec03f701146b5c5fd0cddb608.png">A. 对B. 错
题目5判断题
<img src="https://tihai-oss-cloud.itihey.com/img/dfbfda7300254fd1d07b7273322448ed.png">A. 对B. 错
题目6判断题
<img src="https://tihai-oss-cloud.itihey.com/img/0bfc1452f902b6a931b5f16ef37fb499.png">A. 对B. 错
题目7单选题
<img src="https://tihai-oss-cloud.itihey.com/img/52d29273000407c4cf22909109804cf2.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/e0ac44ac7ad0e27c79148a2afc17df15.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/39eaa3f6db92a0ce6fb3f5234aef7f31.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/5b4f1faeb398a458ab3b81ddc2b976b8.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/1d1b1d39626f606a7a356aa05ad2937f.png">
题目8判断题
<img src="https://tihai-oss-cloud.itihey.com/img/62acb2d11caea6b2024516dd1d1a3c6a.png">A. 对B. 错
题目9单选题
设函数<img src="https://tihai-oss-cloud.itihey.com/img/8e01672dec731051ca68654b83572ae0.png">在点(x,y,z)的某邻域内可微分,则函数u在该点沿着方向<img src="https://tihai-oss-cloud.itihey.com/img/2c81ea9a5ac2f8d7283e19891afe9f53.png">(其中<img src="https://tihai-oss-cloud.itihey.com/img/fdff9f5800997d9476d9e32417eb1281.png">为<img src="https://tihai-oss-cloud.itihey.com/img/9ca1f691951c51f00ac176b05e2ea645.png">的方向角)的方向导数<img src="https://tihai-oss-cloud.itihey.com/img/17cd290996850f001a6cc8c66562837a.png">=( )A. <img src="https://tihai-oss-cloud.itihey.com/img/b9b32b632a0cbabaea8f0af9ab6a0525.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/13ceccd341f501b88fe5534bb0dc7698.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/bcecb7589bdb70a6b8dff7efe12db9f8.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/7befc2dd2f7ceb0a1ed5c70a2aaa6688.png">
题目10判断题
<img src="https://tihai-oss-cloud.itihey.com/img/3871d421aae4d2a56e065f436354a9e4.png">A. 对B. 错
下载 题海APP
拍照搜题更快捷
- 海量题库
- 无搜索限制
- 快捷拍照搜题
