Answer to Question #178170 in Microeconomics for Dawit

Question #178170

1.       Assume that you are working in one of the profit marking firm in town as a research and planning expert. Your organization faces a cost function of C(Q) = 3Q2 + 10Q + 50; and the demand function for the product the firm produces Q = 125 - 5P. If your firm is going to a pricing decision which enable it to maximize its profit. How much price you are expected to advice for the decision maker?

2.      A firm faces a non-linear demand function of P = 250 - 3Q13 - Q12 + Q22  + Q1 - Q2 for two products is the same. Compute the marginal revenue for each product. 


1
Expert's answer
2021-04-08T05:29:20-0400

1.

product demand equation

Q=1255PQ=125-5P

P=250.2Q\therefore P=25-0.2Q

TC=3Q2+100Q+50TC=3Q^2 + 100Q+ 50

MC=6Q+100MC=6Q+100

TR=Q(250.2Q)TR=Q(25-0.2Q)

=25Q0.2Q2=25Q-0.2Q^2

MR=250.4QMR=25-0.4Q

To find Q at which MR=MC

250.4Q=6Q+10025-0.4Q=6Q+100

75=6.4Q-75=6.4Q

Q=11.71875Q=-11.71875

The  negative output  means that there is slack in the economy due to weak demand.


Price associated with Q=-11.71875

P=250.2(11.71875)P=25-0.2(-11.71875)

P=22.65625P=22.65625

I would advice price to be set at 22.65625


2.

MR=ΔTRΔQMR=\frac{\Delta TR}{\Delta Q}

Marginal product for Q1

ΔTR1Q1=250Q23Q13Q2Q12Q2+Q23+Q1Q2Q22ΔQ1\frac{\Delta TR_1}{Q_1}=\frac{250Q_2-3Q_1 ^3Q_2-Q_1^2Q_2+Q_2^3+Q_1Q_2-Q_2^2}{\Delta Q_1}


=9Q2Q122Q2Q1+3Q22+Q12Q2=-9Q_2Q_1^2-2Q_2Q_1+3Q_2^2+Q_1-2Q_2


Marginal product for Q2


ΔTR2Q2=250Q23Q13Q2Q12Q2+Q23+Q1Q2Q22ΔQ2\frac{\Delta TR_2}{Q_2}=\frac{250Q_2-3Q_1 ^3Q_2-Q_1^2Q_2+Q_2^3+Q_1Q_2-Q_2^2}{\Delta Q_2}


=2503Q13Q12+3Q22+Q12Q2=250-3Q_1^3-Q_1^2+3Q_2^2+Q_1-2Q_2

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