Yea, but
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送交者: 唐好色 于 2007-01-30, 04:20:56:
回答: better check your src. Newton's notation like f'(x) is still widely 由 steven 于 2007-01-30, 00:57:53:
not if you want to take partial derivatives. Besides, I think Newton uses x dot or something like that.
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