Solve each rational inequality. Give the solution set in interval notation. 2 /(x - 2) ≥ 1 / x

검증된 단계별 안내

Start by writing the inequality clearly: \(\frac{2}{x - 2} \geq \frac{1}{x}\).

Bring all terms to one side to have a single rational expression: \(\frac{2}{x - 2} - \frac{1}{x} \geq 0\).

Find a common denominator, which is \(x(x - 2)\), and combine the fractions: \(\frac{2x - (x - 2)}{x(x - 2)} \geq 0\).

Simplify the numerator: \(2x - (x - 2) = 2x - x + 2 = x + 2\), so the inequality becomes \(\frac{x + 2}{x(x - 2)} \geq 0\).

Determine the critical points by setting numerator and denominator equal to zero: \(x + 2 = 0\), \(x = 0\), and \(x - 2 = 0\). These points divide the number line into intervals to test the sign of the expression and find where it is greater than or equal to zero.

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Rational Inequalities

Rational inequalities involve expressions where variables appear in the denominator. Solving them requires finding values that satisfy the inequality while ensuring denominators are not zero, as division by zero is undefined.

Finding a Common Denominator and Combining Terms

To solve rational inequalities, rewrite both sides with a common denominator to combine terms into a single rational expression. This allows comparison to zero and simplifies the inequality into a form suitable for analysis.

Sign Analysis and Interval Notation

After simplifying, determine where the rational expression is positive, negative, or zero by analyzing critical points (zeros and undefined points). Use this to identify solution intervals and express the solution set clearly in interval notation.