问题
问答题
设
，其中f(u)具有二阶导数，且f(u)≠0，求
。
答案
参考答案：
因为
，
所以
。
解析：
[考点] 利用参数方程求导法求导即可
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设，其中f(u)具有二阶导数，且f(u)≠0，求。
参考答案：
因为，
所以。
解析：
[考点] 利用参数方程求导法求导即可
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