User talk:Jackylisiukwan

Introduction:
In economics,Use Value (or Total Use Value (TUV)) is the level of satisfication or preference in terms of money to the amount of goods obtained. It follows the law of demand & decreases with more goods or service obtained.

Average use Value (AUV)
Equation definition: $$TUV/Q$$

Marginal Use Value (MUV)
Equation definition: $$\frac{\Delta\ TUV}{\Delta\ Q}$$ As we consider the $$\Delta\ Q\rightarrow 0,$$ we can rewrite as $$\frac{dTUV}{dQ}$$

Utility
By full differential: $$dTU=\frac{\delta X}{\delta U}dX+\frac{\delta X}{\delta U}dY$$