185***242021-03-21 16:12:45
185***24R20第30题，要想平行移动的话，斜率和曲度不变是最好的吧，只要他俩变了不就做不到平行移动了么，而且判断是+1还是-1，得看之前曲线的形状吧，之前曲线的形状如何得知呢，B选项和C选项怎么判断选哪个呢，另外会有曲度很大的凹型曲线出现么，笔记貌似没分析曲度是凹形的情况。谢谢老师
回答（1）
Chris Lan2021-03-22 20:33:18
Chris Lan同学你好
这个题协会已经删除了，不要再做了，其中的29-32题全部删除了。
以下是协会的勘误内容。
[Update:] In the information for questions 23-32 (page 223-225 of print), the paragraph before Exhibit 2, Exhibit 2, the paragraph before Exhibit 3, and Exhibit 3 should all be deleted. Questions 29-32 (page 226 of print) and their solutions (page 237-239 of print) should be deleted as well. Question numbers and solution numbers need to be updated accordingly, as it relates to removal of the previous questions and solutions.
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