tangent line

基本解釋

So, if I draw the tangent line to this slice, x then the slope will be partial f of partial x.
如果畫出這個切片的切線，那么斜率就是?f/?
And visually what we're accomplishing is somehow to take the hyperbola, and take a point on the hyperbola, and figure out some tangent line.
從視覺上看，我們要做的是，想辦法，在這個反函數(shù)，在反函數(shù)上取一個點，設法找出切線。
If the two level curves are tangent to each other that means they have the same tangent line. That means that the normal vectors should be parallel. Let me maybe draw a picture here.
如果兩個等高線相切，說明它們的切線相同,也就是說他們的法向量應該平行,我再在這里畫個圖。

Show me a place where that's not true where the tangent line will be really bad.
請給我個這個原則不對的例子,也就是說切線沒起到相應作用的例子。
麻省理工公開課 - 計算機科學及編程導論課程節(jié)選
That means that you want to pick, ultimately, a point on this-- this line is tangent to the efficient portfolio frontier with all the other assets in it.
那意味著你會最終會在這上面選一個點-,這條直線是與有效邊界相切的,后者包含了所有的資產組合。
耶魯公開課 - 金融市場課程節(jié)選
I don't know how well you can see it in this figure here, is the slope of a straight line connecting these two points, and as the points come closer and closer, the straight line would become tangent to the curve.
我不清楚你們對于這個圖像的理解,這條連接兩點的斜線,隨著兩點距離逐漸縮小,兩點連線會變成曲線的切線
耶魯公開課 - 基礎物理課程節(jié)選