I have a question please , now if they asked me find all the times between an interval for which the particle moves to the left , what should I answer? Is it setting the velocity equal to zero and find where times is negative and then set them as an interval?
(I hope I'm answering the right thing here...) It's not that we just flip the sign, I started by writing the FTC, which gives int(v(t),t,0,4) = x(4) - x(0) and then solved for x(0), so add x(0) to both sides and then subtract the integral from both sides. It's this kind of thing: If A = B - C, then C = B - A. Hope this helps!
Definitely make sure you know how to find derivatives, definite integrals, zeros of a function, and how to graph a function if you're going to be taking the AP Calculus exam. Here's a video on finding derivatives: ruclips.net/video/kkmnUxr4VzI/видео.html
Always make sure your calculator is in radian mode when you're doing calculus. All of the angles you'll deal with are in radians and the derivatives of the trig functions are dependent upon you working in radians.
Hi! Do you mean to ask why I keep using t = 4? That was given in the original statement of the problem. (It's the only 4 I see in the video, so I'm guessing that's what you meant. Let me know if it's not!)
you're my hero I hope you know that - you're out here saving lives
not all heroes wear capes--some just make a lot of calculus videos.
Facts 🎉
I have a question please , now if they asked me find all the times between an interval for which the particle moves to the left , what should I answer? Is it setting the velocity equal to zero and find where times is negative and then set them as an interval?
moving to the left means v(t)
could u explain why you have to flip the sign from positive to neg to solve for part c?
(I hope I'm answering the right thing here...) It's not that we just flip the sign, I started by writing the FTC, which gives int(v(t),t,0,4) = x(4) - x(0) and then solved for x(0), so add x(0) to both sides and then subtract the integral from both sides. It's this kind of thing: If A = B - C, then C = B - A. Hope this helps!
how do you find a(t) (or v't) in part a? is there a way you do that with a calculator?
Definitely make sure you know how to find derivatives, definite integrals, zeros of a function, and how to graph a function if you're going to be taking the AP Calculus exam. Here's a video on finding derivatives:
ruclips.net/video/kkmnUxr4VzI/видео.html
@@turksvids thank you
Can you just find the integral in part c and then plug in 0?
Oh I see it would be difficult since this is a calculator problem.
Hey do you think the ap exam this year for ap calc will be normal with MC and everything else?
as of right now (1/29/2021) they still say that it will be the normal format. remains to be seen if that changes depending on safety and whatnot.
My calculator was in deg mode. I changed to rad mode and I got the ans. Why?
Always make sure your calculator is in radian mode when you're doing calculus. All of the angles you'll deal with are in radians and the derivatives of the trig functions are dependent upon you working in radians.
Help please. My calculator gives me 1.27 as v(4)
Idk if you still need this, but for other people, v(4) is given as 2
how do you find the 4 as your x value for your interval?
Hi! Do you mean to ask why I keep using t = 4? That was given in the original statement of the problem. (It's the only 4 I see in the video, so I'm guessing that's what you meant. Let me know if it's not!)