# Thread: Calculus Question - How to find the marginal revenue?

1. ## Calculus Question - How to find the marginal revenue?

 The marginal revenue function is the differential of the total revenue function. For the total revenue function TR = 500Q + 3Q2 where Q is the quantity produced, find the value of the marginal revenue (MR) when Q equals 71. Give answer to nearest integer value.

Can someone please show me how to answer this question? Thanks very much

2. ## Re: Calculus Question - How to find the marginal revenue?

you first ... what is the derivative of $R = 500Q + 3Q^2$ ?

3. ## Re: Calculus Question - How to find the marginal revenue?

Originally Posted by skeeter
you first ... what is the derivative of $R = 500Q + 3Q^2$ ?
I don't know how to do that, would you mind showing me?

4. ## Re: Calculus Question - How to find the marginal revenue?

When a person posts a problem, we assume they have the basic knowledge to at least attempt to work it out. I can tell you that this is a very basic derivative. I recommend you research how ... here's a link to get you started.

http://evlm.stuba.sk/~partner7/DBfil...rentiation.pdf

5. ## Re: Calculus Question - How to find the marginal revenue?

okay so

$\frac{dt}{dq} = 500 + 6Q$

6. ## Re: Calculus Question - How to find the marginal revenue?

can you show me what to do next?

7. ## Re: Calculus Question - How to find the marginal revenue?

Originally Posted by Arivioz
${\color{red}\frac{dR}{dQ}} = 500 + 6Q$
correction ...

... now sub in Q = 71 to find the marginal revenue.

8. ## Re: Calculus Question - How to find the marginal revenue?

okay so the answer is 926?