Answer to Question #271893 in Microeconomics for kalehiwot

Question #271893

1.     Find the price elasticity of supply at price of Birr 8 if the supply function is:

Q = 25 – 4P + P2

What is elasticity at Birr 4 and at Birr 5? Interpret the result.


1
Expert's answer
2021-11-30T10:10:05-0500

Q=254P+P2Q=25-4P+P^2

Elasticity of supply:

=PQ(P)dQdP=\frac{P}{Q(P)}\frac{dQ}{dP}

=P254P+P2(4+2P)=\frac{P}{25-4P+P^2}(-4+2P)

=4P+2P2254P+P2=\frac{-4P+2P^2}{25-4P+P^2}

At P= Birr 8,

=4(8)+2(82)254(8)+82=1.88=\frac{-4(8)+2(8^2)}{25-4(8)+8^2}=1.88

Price elasticity of supply being 1.88 implies that supply is elastic.


At P=Birr 4,

Elasticity of supply:

=4(4)+2(42)254(4)+42=0.64=\frac{-4(4)+2(4^2)}{25-4(4)+4^2}=0.64

Elasticity of supply being 0.64 implies that supply is inelastic.


At P=Birr 5,

Elasticity of supply:

=4(5)+2(52)254(5)+52=1=\frac{-4(5)+2(5^2)}{25-4(5)+5^2}=1

Elasticity of supply being 1 implies that supply is unit elastic.


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