Question

Suppose that the demand of a certain item is x=10+1/p^2. Evaluate the elasticity at .5

Answer 1

It think you're supposed to use:\[
E_d = p_0\frac{x'(p_0)}{x(p_0)}
\]

Answer 2

Is this what you are looking to evaluate?

http://en.wikipedia.org/wiki/Elasticity_of_a_function

Answer 3

I am looking to evaluate: E(p)=(-p/q)*(dq/dp). But I have no idea how to do that.