Find the sum of the infinite geometric series below. 
Definitions:
Marginal Revenue
The additional income received from selling one more unit of a good or service, vital for decision-making in firms.
Total Revenue
The overall amount of money received by a firm from selling its goods or services, calculated by multiplying the price by the quantity sold.
Output
The total quantity of goods or services produced by an individual, firm, or country over a specified period.
Perfect Competition
A market structure characterized by a large number of small firms, identical products, and free entry and exit, leading to price takers.
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