设参数方程 ,确定了y是x的函数,f''(t)存在且不为零,则d2y/dx2 的值是:

作者: tihaiku 人气: - 评论: 0
问题 设参数方程 ,确定了y是x的函数,f''(t)存在且不为零,则d2y/dx2 的值是:
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答案 D
解析 提示:利用参数方程求导公式求出dy/dx,在求二阶导数时,先对t求导后,再乘t对x的导数。计算如下:

相关内容:参数,方程,函数

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