非常好，这是一元微积分中，你们至少应该记住的。
Very good. OK, that's at least one thing you should remember from single variable calculus.
如果说你要知道，关于一元微积分中所有的求导法则。
Let's say that you want to understand actually all these rules about taking derivatives in single variable calculus.
我指的是，在这种形式下，它和一元微积分的表述是一样的。
I mean, in this form, actually it's the same statement as in single variable calculus.
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