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Example: Solving a Rational Inequality with a Constant Numerator
To solve a rational inequality with a constant numerator, such as , first verify it is in the correct form with on one side. Factoring the denominator yields . Next, determine the zero partition numbers. The quotient is when the numerator is ; however, since the numerator is the constant , the quotient cannot be . Thus, there are no zero partition numbers from the numerator. The quotient is undefined when the denominator is , which happens when , resulting in and . These are the only zero partition numbers. Use and to divide the number line into intervals: , , and . By testing values in each interval, we find where the quotient is positive. Because the inequality is strictly greater than , the zero partition numbers are excluded. The final solution in interval notation is .
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Intermediate Algebra @ OpenStax
Ch.7 Rational Expressions and Functions - Intermediate Algebra @ OpenStax
Algebra
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