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Returns to scale refer to a special relationship between output and input. During production, this relationship refers to the connection between the changes that occur with the output and those that began in the input.
function
Dual input and Balanced output configuration, Dual input and Unbalanced output configuration, Single input and Balanced output configuration and Single input and Unbalanced output configuration
There need not be any relationship.
input
A function.
is unknown
Design
Relation
"not" gate
Function
Input energy = output energy + losses