And, just to motivate that, let me remind you about one trick that you probably know from single variable calculus, namely implicit differentiation.

作为引子，你们可能已经知道了，一元微积分里面的一个小把戏，也就是求隐函数微分法。

youdao

And, just to motivate that, let me remind you about one trick that you probably know from single variable calculus, namely implicit differentiation.

作为引子，你们可能已经知道了，一元微积分里面的一个小把戏，也就是求隐函数微分法。

youdao