Multiple choice help

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Solve the problem.

If the price of a product is given by P(x) = 1024/x + 700, where x represents the demand for the product, find the rate of change of price when the demand is 2.

a. 512
b. 256
c. -512
d. -256


1024/2 is 512, so would this be the answer
 
First Derivative, P'(x)
Evaluate at x = 2
Show your work.
 
tk how do I do that derivitave thing? This is a review I dont remember can you help refresh it?
 
Yikes! I am not encouraged.

Is this an economics class and they just zipped over the calculus you would need? Not good.

P'(x) = -1024/(x^2)

Is that familiar at all?
 
BrookeD said:
how do I do that derivitave thing?
Click to expand...
You don't remember how to do derivatives...?

Please keep in mind that your class took weeks, if not months, to cover various aspects of differentiation. If you truly don't know how to do them now, then your needs are likely beyond anything we can assist with in this environment.

Thank you.

Eliz.
 
Stapel please leave me alone. TKhunny, I am sorry I am so stupid!
 
We're not talking about "stupid", here. Sometimes we just have to shake our heads a bit at problems that seem to be given to students without ANY background or training. If you really have no clue, something is seriously wrong. You should not be in a position of desperation. Two possibilities cover a vast preponderance of what your situation could be: 1) You have been sleeping through class for the entire semester, or 2) Your teacher doesn't deserve to be called a "teacher". Both situations are very frustrating to all, students, tutors, teachers, administrators, parents, and on and on and on...

Now, answer my question. I gave you the first derivative. Does it look familiar at all? Could your produce it yourself?
 
Thank you for your honest reply. Sadly, we can't write you a new book. You probably have one already. You must go review the section on derivatives. You posted in the "Calculus" section, so we know you have at least heard of the derivative, at least once (I think). I really don't know where to go from here. I think you are past our capabilities. Perhaps some can suggest a beginning calculus review that you can find online. stapel?
 
tkhunny said:
Perhaps some can suggest a beginning calculus review that you can find online.
Click to expand...
I haven't researched online calculus lessons, but Paul's Online Math Notes has some stuff that looks good. This might be worth a peek.

Eliz.
 
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