Derivative Questions and Solutions for y(r) = (r^2-8r)exp(-r) at r=8.00

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The discussion revolves around finding the first and second derivatives of the function y(r) = (r^2 - 8r)exp(-r) at r = 8.00, as well as determining the points of minimum and maximum values for y in the interval r ≥ 0. Participants emphasize the necessity of understanding calculus, particularly derivatives, to solve these problems effectively. There is a concern about the appropriateness of assigning derivative problems in a physics course without prior calculus knowledge. The thread concludes with a moderator locking the discussion due to a perceived lack of effort from the original poster.
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Homework Statement



Consider the following function of variable r, for r greater or equal to 0.
y(r)=(r^2-8r)exp(-r)

1. Find the value of the first derivative at r=8.00
2. Find the value of the second derivative at r=8.00
3. Find the value of r where y takes its meinimum value in the r is greater or equal to 0 interval
4. Find the value of r where y takes its maximum value in the r is greater or equal to 0 interval


Please explain how you do it too! I am so lost :(


Homework Equations





The Attempt at a Solution

 
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looks like you need to take the derivative of the function y(r) and then plug in the values
 
I know but I have no idea how to do that, I am new to physics so this is all new to me.
 
This has nothing to do with physics and everything to do with calculus. Have you studied it and have you studied derivatives in particular?
 
I have not learned anything about derivatives. My Physics Professor just decides to assign us 3 derivative problems over the weekend on MasteringPhysics :(
 
I am not sure what this could possibly mean. If you have not taken any calculus, then you won't be able to solve this problem.
 
Is calculus a prerequisite for the physics course? Are you taking algebra based physics or calculus based physics?
 
The OP has not shown any effort. I am locking this thread.
 

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