In economics, we extend the concept of consumer surplus of demandfunction and producer surplus of supply function to cover the fuzzysense. Here we deal with the following four sets of types of demandand supply functions. (i) Both demand and supply functions arelinear. (ii) Both demand and supply functions re quadratic. (iii)Demand function is quadratic and supply function is linear. (iv)Demand function is linear and supply function is quadratic.
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