Second derivatives (parametric functions) | Advanced derivatives | AP Calculus BC | Khan Academy

Sal finds the second derivative of the function defined by the parametric equations x=3e__ and y=3__-1.

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[BluFFiNMuFFiN]

You're a life saver Saul :') thank you much!

[TheCaptain]

The second derivative doesn't seem intuitive at first, glad I watched this video as a refresher.

[sgun]

The answer is not 1/(12e^t) it's 12/(e^t) because 12 is not to the power of -1 only e^t is.

[darpmosh]

Hello Mr. Khan, I just have a question: why is the second derivative set up like ((d^2)y/(dx^2)) instead of something like dy^2/dx^2

[satyamtiwari]

Your writing through mouse is much much better than my handwriting😅

[davidcarmichael]

You're awesome Thank u !!!! So much

[arbitrary_inquiry]

was so concerned that sal wasn't going to put that three in front of e.

[fourthhorndeservesrats]

him saying “i encourage you to pause the video and think about it” at 3:51 was lowkey passive aggressive

[anon]

Wow glad i watched it, else i would have never known why we use that equation for Second derivatives of parametric functions....my teacher just told me to mug up the equation

[sergey_zatsepin]

Well, I don't understand why we need to divide on dx/dt, and not just take the second derivative of dy/dx

[IguanoTwix]

Why does he sound so different in this video? haha