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:

NaCl

Sodium chloride, commonly known as table salt, an ionic compound that is essential for life in small quantities and used widely as a seasoning and preservative.

Vein

Blood vessel that arises from venules and transports blood toward the heart.

Plasmolysis

The process in which cells lose water in a hypertonic solution, causing the cell membrane to pull away from the cell wall.

Crenation

Crenation describes the process where cells lose water in a hypertonic solution, resulting in a shrunken, scalloped appearance typically observed in red blood cells.