≥

Definition

The symbol '≥' represents the concept of 'greater than or equal to' in mathematics. It is used to indicate that a value is either greater than or exactly equal to another value, establishing a boundary for inequalities. This symbol plays a vital role in expressing conditions, particularly in absolute value inequalities and optimization problems, where it helps define feasible solutions and constraints.

5 Must Know Facts For Your Next Test

1. '≥' is used to describe situations where a certain condition must be met or exceeded, which is common in both absolute value inequalities and optimization scenarios.
2. When solving inequalities with '≥', the solution set can include endpoints, unlike strict inequalities (using '>') which do not include them.
3. In graphing, '≥' often translates into solid lines or closed circles on number lines, indicating that boundary points are included in the solution.
4. '≥' can appear in constraints for linear programming problems, defining limits within which an optimal solution must fall.
5. Understanding '≥' is crucial when analyzing solutions for absolute value equations, as they can produce two potential conditions based on whether the expression inside is positive or negative.

Review Questions

• How does the symbol '≥' change the solution set of an inequality compared to using '>'?
  • '≥' includes solutions where the variable is equal to a specific value, while '>' excludes that value. For example, if we have the inequality x ≥ 3, it means x can be any number 3 or greater. In contrast, with x > 3, the solution set starts just above 3 and excludes it. This distinction is crucial for finding all possible solutions in inequality problems.
• Discuss how '≥' functions within the context of linear programming and its impact on feasible regions.
  • '≥' establishes constraints that limit potential solutions in linear programming problems. When using '≥' in constraints, it defines a boundary above which solutions must lie, effectively shaping the feasible region. This region represents all combinations of variables that meet the specified criteria. Understanding this is key to identifying optimal solutions while remaining compliant with given limitations.
• Evaluate the importance of using '≥' in absolute value inequalities and its implications on solving for variable values.
  • '≥' is essential when dealing with absolute value inequalities because it sets conditions for both positive and negative scenarios. For instance, an inequality like |x| ≥ 4 implies two cases: x ≥ 4 and x ≤ -4. This duality shows how '≥' allows for multiple valid solutions reflecting the distance from zero on the number line. Thus, grasping this concept helps in accurately determining all possible variable values that satisfy the inequality.

Related terms

Inequality: A mathematical expression that compares two values or expressions, indicating that one is larger, smaller, or not equal to the other.

Feasible Region:

The set of all possible solutions that satisfy the constraints of a linear programming problem, often represented graphically.

Absolute Value:

The distance of a number from zero on the number line, regardless of its sign, often expressed as |x|.