Let $L$ Be the Language Defined by the Regular Expression $( x \mid y ) ^ { * } x ( x \mid y )$

question 6

Essay

Let $L$ be the language defined by the regular expression $( x \mid y ) ^ { * } x ( x \mid y )$ .
(a) Write 3 strings that belong to $L$
(b) Use words to describe $L$ .

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Definitions:

Clean Environment

An environment free from pollutants and toxins, often associated with sustainable practices and policies.

Pollution

The release of harmful substances into the natural environment, causing detrimental effects on air, water, soil quality, and overall ecosystem health.

Costs of Production

Costs of production refer to the total expenses incurred in manufacturing a product or offering a service, including raw materials, labor, and overhead costs.

Marginal Benefit

The additional benefit received from consuming one more unit of a good or service.