So, what does the second derivative test say?

那么二阶导数判定是怎样的呢？

youdao

So, it's the second derivative of a position vector.

它是位置向量的二阶导。

youdao

The second derivative, they say, is turning positive.

他们说二阶导数转为正值了。

youdao

The second derivative, they say, is turning positive.

他们说二阶导数转为正值了。

youdao