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Example: Solving a Rational Inequality Requiring a Common Denominator
To solve a rational inequality that requires combining fractions, such as , first rewrite it so that is on one side. Subtracting yields . Next, rewrite each fraction using the least common denominator (LCD), which is , to combine them into a single rational expression: . Then, factor the numerator to obtain . After factoring, determine the zero partition numbers by finding the values where the numerator or denominator equals zero. Setting the numerator factors to zero gives and , while setting the denominator to zero gives . Use these partition numbers to divide the number line into intervals: , , , and . By evaluating the sign of each factor in these intervals, determine the overall sign of the quotient. The quotient is negative in the intervals and . Since the inequality is strictly less than zero (<$), the partition numbers that make the expression equal to zero are excluded. Because zero partition numbers from the denominator are always excluded, the solution in interval notation is the union of these two intervals: (-1, 0) \cup (0, 6)$$.
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Ch.7 Rational Expressions and Functions - Intermediate Algebra @ OpenStax
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As a supply chain logistics trainee, you are documenting the standard procedure for determining production ranges where the cost-to-revenue ratio falls below a specific threshold. This optimization model requires solving rational inequalities. Arrange the mathematical steps for solving a rational inequality into the correct procedural order for your algorithm documentation.
In your role as a technical analyst documenting standard operating procedures, you are outlining the steps for solving rational inequalities used in resource allocation models. Match each procedural step with its primary mathematical objective as defined in the standard systematic method.
As a laboratory assistant documenting the standard operating procedure for calculating concentration safety thresholds, you are outlining the method for solving rational inequalities. According to the systematic procedure, what is the mandatory first step you must perform before identifying any critical values or test intervals?
In your role as a technical analyst documenting safety compliance ranges, you must adhere to the systematic procedure for solving rational inequalities. True or False: According to this procedure, any value that makes the denominator of a rational expression equal to must always be excluded from the final solution set, regardless of whether the inequality uses non-strict symbols like or .
Procedural Step for Sign Evaluation in Rational Inequalities
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A logistics supervisor is evaluating a distribution model that uses the rational inequality . To find the valid range for the variable , the supervisor must follow a specific sequence of algebraic steps. Place the following actions in the correct order according to the standard procedure for solving such inequalities.
An industrial technician is using the rational inequality to model the efficiency of a cooling system. To solve this inequality, the first major step after moving all terms to one side is to combine them using a common denominator. Based on the provided example, what is the Least Common Denominator (LCD) used for this calculation?
An industrial technician is evaluating a crane's load safety using the rational inequality . After combining the terms into a single rational expression, the technician simplifies the inequality to . To solve this, the technician identifies the partition numbers that divide the number line into intervals. If two of the partition numbers are -1 and 6, what is the third partition number? ____
A systems analyst is optimizing a server's response time using the rational inequality . Match the following components of the solution process to their correct roles or values based on the simplified expression .
A supply chain manager is modeling warehouse efficiency with a rational inequality that simplifies to . True or False: When determining the final valid intervals for this model, the partition number derived from setting the denominator to zero () must be included in the solution set.