Find $\bigcup _ { i = 1 } ^ { + \infty } [ - 1 / i , 1 / i ]$

question 83

Short Answer

Find $\bigcup _ { i = 1 } ^ { + \infty } [ - 1 / i , 1 / i ]$

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Definitions:

Elasticity of Demand

A measure of how the quantity demanded of a good or service responds to a change in its price, indicating the sensitivity of consumers to price changes.

Percentage Change

A mathematical calculation that indicates how much a number has increased or decreased in percentage terms relative to its previous value.

Price Elastic

Describes how sensitive demand for a product or service is to changes in its price; high elasticity indicates significant demand change with price fluctuations.

Nondiscretionary

Pertaining to expenses that are essential and not subject to personal choice, such as food, housing, and utilities.