# Special Utility Functions

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### Conditions of Perfect Complements

- Perfect Complements takes the form .

- Indifference curve is L-shaped, with the vertex of the L-shape passing through the line

- Interpretation is left shoe-right shoe

- When doing optimization problems, we always equate the two components in the min{. , .}. That is ax
_{1}= bx_{2}. When ax_{1}= bx_{2}, we are not using any extra resources, and the utility (or production function) is u = ax_{1}= bx_{2}.

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