Engineering Economics
Duopoly is a market situation where there is/are:

Many sellers and few buyers
Few sellers and few buyers
Few sellers and many buyers
One seller and few buyers

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Engineering Economics
In a cash flow series:

Uniform gradient signifies that an income or disbursement changes by the same amount in each interest period
The gradient in the cash flow may be positive or negative
Either an increase or decrease in the amount of a cash flow is called the gradient
All of these

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